12491618 has 8 divisors (see below), whose sum is σ = 18909660. Its totient is φ = 6188400.

The previous prime is 12491603. The next prime is 12491627. The reversal of 12491618 is 81619421.

It can be written as a sum of positive squares in 2 ways, for example, as 12411529 + 80089 = 3523^2 + 283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28433 + ... + 28868.

Almost surely, 2^12491618 is an apocalyptic number.

12491618 is a deficient number, since it is larger than the sum of its proper divisors (6418042).

12491618 is a wasteful number, since it uses less digits than its factorization.

12491618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57412.

The product of its digits is 3456, while the sum is 32.

The square root of 12491618 is about 3534.3483133387. The cubic root of 12491618 is about 232.0275556845.

The spelling of 12491618 in words is "twelve million, four hundred ninety-one thousand, six hundred eighteen".