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1231230 = 2357111341
BaseRepresentation
bin100101100100101111110
32022112221010
410230211332
5303344410
642220050
713315410
oct4544576
92275833
101231230
11771050
124b4626
13341550
142409b0
15194c20
hex12c97e

1231230 has 128 divisors (see below), whose sum is σ = 4064256. Its totient is φ = 230400.

The previous prime is 1231229. The next prime is 1231231. The reversal of 1231230 is 321321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1231229) and next prime (1231231).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30010 + ... + 30050.

It is an arithmetic number, because the mean of its divisors is an integer number (31752).

21231230 is an apocalyptic number.

1231230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2032128).

1231230 is an abundant number, since it is smaller than the sum of its proper divisors (2833026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231230 is a wasteful number, since it uses less digits than its factorization.

1231230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1231230 is about 1109.6080389038. The cubic root of 1231230 is about 107.1798297798.

Adding to 1231230 its reverse (321321), we get a palindrome (1552551).

Subtracting from 1231230 its reverse (321321), we obtain a palindrome (909909).

The spelling of 1231230 in words is "one million, two hundred thirty-one thousand, two hundred thirty".

Divisors: 1 2 3 5 6 7 10 11 13 14 15 21 22 26 30 33 35 39 41 42 55 65 66 70 77 78 82 91 105 110 123 130 143 154 165 182 195 205 210 231 246 273 286 287 330 385 390 410 429 451 455 462 533 546 574 615 715 770 858 861 902 910 1001 1066 1155 1230 1353 1365 1430 1435 1599 1722 2002 2145 2255 2310 2665 2706 2730 2870 3003 3157 3198 3731 4290 4305 4510 5005 5330 5863 6006 6314 6765 7462 7995 8610 9471 10010 11193 11726 13530 15015 15785 15990 17589 18655 18942 22386 29315 30030 31570 35178 37310 41041 47355 55965 58630 82082 87945 94710 111930 123123 175890 205205 246246 410410 615615 1231230