12587631 has 16 divisors (see below), whose sum is σ = 19244544. Its totient is φ = 7169184.

The previous prime is 12587629. The next prime is 12587677. The reversal of 12587631 is 13678521.

It is not a de Polignac number, because 12587631 - 2¹ = 12587629 is a prime.

It is a super-2 number, since 2×12587631² = 316896908384322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12587592 and 12587601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12537631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7030 + ... + 8636.

It is an arithmetic number, because the mean of its divisors is an integer number (1202784).

Almost surely, 2^12587631 is an apocalyptic number.

12587631 is a deficient number, since it is larger than the sum of its proper divisors (6656913).

12587631 is a wasteful number, since it uses less digits than its factorization.

12587631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its digits is 10080, while the sum is 33.

The square root of 12587631 is about 3547.9051565677. The cubic root of 12587631 is about 232.6205086918.

The spelling of 12587631 in words is "twelve million, five hundred eighty-seven thousand, six hundred thirty-one".