12645522 has 12 divisors (see below), whose sum is σ = 27398670. Its totient is φ = 4215168.

The previous prime is 12645509. The next prime is 12645533. The reversal of 12645522 is 22554621.

12645522 is a `hidden beast` number, since 12 + 645 + 5 + 2 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8520561 + 4124961 = 2919^2 + 2031^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 351247 + ... + 351282.

Almost surely, 2^12645522 is an apocalyptic number.

12645522 is an abundant number, since it is smaller than the sum of its proper divisors (14753148).

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

12645522 is a wasteful number, since it uses less digits than its factorization.

12645522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702537 (or 702534 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 12645522 is about 3556.0542740515. The cubic root of 12645522 is about 232.9765736239.

Subtracting 12645522 from its reverse (22554621), we obtain a palindrome (9909099).

It can be divided in two parts, 1264 and 5522, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 12645522 in words is "twelve million, six hundred forty-five thousand, five hundred twenty-two".