12491644 has 24 divisors (see below), whose sum is σ = 24495408. Its totient is φ = 5523840.

The previous prime is 12491627. The next prime is 12491693. The reversal of 12491644 is 44619421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2209 + ... + 5464.

It is an arithmetic number, because the mean of its divisors is an integer number (1020642).

Almost surely, 2^12491644 is an apocalyptic number.

It is an amenable number.

12491644 is a deficient number, since it is larger than the sum of its proper divisors (12003764).

12491644 is a wasteful number, since it uses less digits than its factorization.

12491644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7725 (or 7723 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 12491644 is about 3534.3519915255. The cubic root of 12491644 is about 232.0277166648.

The spelling of 12491644 in words is "twelve million, four hundred ninety-one thousand, six hundred forty-four".