12631257 has 12 divisors (see below), whose sum is σ = 19205680. Its totient is φ = 7977528.

The previous prime is 12631237. The next prime is 12631261. The reversal of 12631257 is 75213621.

It is a happy number.

12631257 is a `hidden beast` number, since 1 + 2 + 631 + 25 + 7 = 666.

12631257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12631257 - 2⁶ = 12631193 is a prime.

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 12631257.

It is not an unprimeable number, because it can be changed into a prime (12631237) 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, 36763 + ... + 37104.

Almost surely, 2^12631257 is an apocalyptic number.

It is an amenable number.

12631257 is a deficient number, since it is larger than the sum of its proper divisors (6574423).

12631257 is a wasteful number, since it uses less digits than its factorization.

12631257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73892 (or 73889 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12631257 is about 3554.0479737899. The cubic root of 12631257 is about 232.8889362430. Note that the first 3 decimals are identical.

Adding to 12631257 its reverse (75213621), we get a palindrome (87844878).

The spelling of 12631257 in words is "twelve million, six hundred thirty-one thousand, two hundred fifty-seven".