12536531 has 12 divisors (see below), whose sum is σ = 15222288. Its totient is φ = 10111872.

The previous prime is 12536507. The next prime is 12536533. The reversal of 12536531 is 13563521.

It is not a de Polignac number, because 12536531 - 2⁶ = 12536467 is a prime.

It is a super-2 number, since 2×12536531² = 314329219027922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12536531.

It is not an unprimeable number, because it can be changed into a prime (12536533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1076 + ... + 5121.

It is an arithmetic number, because the mean of its divisors is an integer number (1268524).

Almost surely, 2^12536531 is an apocalyptic number.

12536531 is a deficient number, since it is larger than the sum of its proper divisors (2685757).

12536531 is an equidigital number, since it uses as much as digits as its factorization.

12536531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238 (or 6221 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 12536531 is about 3540.6964004275. The cubic root of 12536531 is about 232.3053043059.

The spelling of 12536531 in words is "twelve million, five hundred thirty-six thousand, five hundred thirty-one".