12491624 has 8 divisors (see below), whose sum is σ = 23421810. Its totient is φ = 6245808.

The previous prime is 12491603. The next prime is 12491627. The reversal of 12491624 is 42619421.

It can be written as a sum of positive squares in only one way, i.e., 9498724 + 2992900 = 3082^2 + 1730^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12491627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780719 + ... + 780734.

Almost surely, 2^12491624 is an apocalyptic number.

It is an amenable number.

12491624 is a deficient number, since it is larger than the sum of its proper divisors (10930186).

12491624 is a wasteful number, since it uses less digits than its factorization.

12491624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561459 (or 1561455 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 12491624 is about 3534.3491621514. The cubic root of 12491624 is about 232.0275928339.

The spelling of 12491624 in words is "twelve million, four hundred ninety-one thousand, six hundred twenty-four".