12501531 has 12 divisors (see below), whose sum is σ = 20637552. Its totient is φ = 7143696.

The previous prime is 12501527. The next prime is 12501583. The reversal of 12501531 is 13510521.

It is not a de Polignac number, because 12501531 - 2² = 12501527 is a prime.

It is a super-2 number, since 2×12501531² = 312576554687922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12501331) 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, 99156 + ... + 99281.

It is an arithmetic number, because the mean of its divisors is an integer number (1719796).

Almost surely, 2^12501531 is an apocalyptic number.

12501531 is a deficient number, since it is larger than the sum of its proper divisors (8136021).

12501531 is a wasteful number, since it uses less digits than its factorization.

12501531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198450 (or 198447 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 12501531 is about 3535.7504153998. The cubic root of 12501531 is about 232.0889163238.

The spelling of 12501531 in words is "twelve million, five hundred one thousand, five hundred thirty-one".