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1312212 = 223119941
BaseRepresentation
bin101000000010111010100
32110200000110
411000113110
5313442322
644043020
714103456
oct5002724
92420013
101312212
11816980
12533470
1336c375
142622d6
151adc0c
hex1405d4

1312212 has 24 divisors (see below), whose sum is σ = 3340512. Its totient is φ = 397600.

The previous prime is 1312211. The next prime is 1312229. The reversal of 1312212 is 2122131.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4839 + ... + 5102.

It is an arithmetic number, because the mean of its divisors is an integer number (139188).

21312212 is an apocalyptic number.

1312212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312212 is an abundant number, since it is smaller than the sum of its proper divisors (2028300).

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

1312212 is a wasteful number, since it uses less digits than its factorization.

1312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9959 (or 9957 counting only the distinct ones).

The product of its digits is 24, while the sum is 12.

The square root of 1312212 is about 1145.5182233382. The cubic root of 1312212 is about 109.4799696478.

Adding to 1312212 its reverse (2122131), we get a palindrome (3434343).

It can be divided in two parts, 13122 and 12, that multiplied together give a cube (157464 = 543).

The spelling of 1312212 in words is "one million, three hundred twelve thousand, two hundred twelve".

Divisors: 1 2 3 4 6 11 12 22 33 44 66 132 9941 19882 29823 39764 59646 109351 119292 218702 328053 437404 656106 1312212