12531857 has 12 divisors (see below), whose sum is σ = 14043420. Its totient is φ = 11164608.

The previous prime is 12531851. The next prime is 12531859. The reversal of 12531857 is 75813521.

It can be written as a sum of positive squares in 6 ways, for example, as 2027776 + 10504081 = 1424^2 + 3241^2 .

It is not a de Polignac number, because 12531857 - 2¹² = 12527761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3623 + ... + 6179.

It is an arithmetic number, because the mean of its divisors is an integer number (1170285).

Almost surely, 2^12531857 is an apocalyptic number.

It is an amenable number.

12531857 is a deficient number, since it is larger than the sum of its proper divisors (1511563).

12531857 is a wasteful number, since it uses less digits than its factorization.

12531857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612 (or 2599 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 12531857 is about 3540.0362992489. The cubic root of 12531857 is about 232.2764305566.

The spelling of 12531857 in words is "twelve million, five hundred thirty-one thousand, eight hundred fifty-seven".