12531855 has 48 divisors (see below), whose sum is σ = 23818752. Its totient is φ = 5510400.

The previous prime is 12531851. The next prime is 12531859. The reversal of 12531855 is 55813521.

12531855 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12531851) and next prime (12531859).

It is not a de Polignac number, because 12531855 - 2² = 12531851 is a prime.

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176470 + ... + 176540.

It is an arithmetic number, because the mean of its divisors is an integer number (496224).

Almost surely, 2^12531855 is an apocalyptic number.

12531855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12531855 is a deficient number, since it is larger than the sum of its proper divisors (11286897).

12531855 is an equidigital number, since it uses as much as digits as its factorization.

12531855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 127 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The square root of 12531855 is about 3540.0360167659. The cubic root of 12531855 is about 232.2764182000.

The spelling of 12531855 in words is "twelve million, five hundred thirty-one thousand, eight hundred fifty-five".