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121230 = 2335449
BaseRepresentation
bin11101100110001110
320011022000
4131212032
512334410
62333130
71013304
oct354616
9204260
10121230
118309a
125a1a6
1343245
1432274
1525dc0
hex1d98e

121230 has 32 divisors (see below), whose sum is σ = 324000. Its totient is φ = 32256.

The previous prime is 121229. The next prime is 121259. The reversal of 121230 is 32121.

Adding to 121230 its reverse (32121), we get a palindrome (153351).

It can be divided in two parts, 121 and 230, that added together give a triangular number (351 = T26).

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46 + ... + 494.

It is an arithmetic number, because the mean of its divisors is an integer number (10125).

2121230 is an apocalyptic number.

121230 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 121230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162000).

121230 is an abundant number, since it is smaller than the sum of its proper divisors (202770).

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

121230 is a wasteful number, since it uses less digits than its factorization.

121230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 121230 is about 348.1809874189. The cubic root of 121230 is about 49.4921934429.

The spelling of 121230 in words is "one hundred twenty-one thousand, two hundred thirty".

Divisors: 1 2 3 5 6 9 10 15 18 27 30 45 54 90 135 270 449 898 1347 2245 2694 4041 4490 6735 8082 12123 13470 20205 24246 40410 60615 121230