12639892 has 6 divisors (see below), whose sum is σ = 22119818. Its totient is φ = 6319944.

The previous prime is 12639889. The next prime is 12639901. The reversal of 12639892 is 29893621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11587216 + 1052676 = 3404^2 + 1026^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1579983 + ... + 1579990.

Almost surely, 2^12639892 is an apocalyptic number.

It is an amenable number.

12639892 is a deficient number, since it is larger than the sum of its proper divisors (9479926).

12639892 is a wasteful number, since it uses less digits than its factorization.

12639892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159977 (or 3159975 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 12639892 is about 3555.2625782071. The cubic root of 12639892 is about 232.9419934562.

It can be divided in two parts, 12639 and 892, that added together give a palindrome (13531).

The spelling of 12639892 in words is "twelve million, six hundred thirty-nine thousand, eight hundred ninety-two".