12491816 has 16 divisors (see below), whose sum is σ = 24655200. Its totient is φ = 5917104.

The previous prime is 12491807. The next prime is 12491819. The reversal of 12491816 is 61819421.

12491816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12491819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40940 + ... + 41243.

It is an arithmetic number, because the mean of its divisors is an integer number (1540950).

Almost surely, 2^12491816 is an apocalyptic number.

It is an amenable number.

12491816 is a deficient number, since it is larger than the sum of its proper divisors (12163384).

12491816 is a wasteful number, since it uses less digits than its factorization.

12491816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82208 (or 82204 counting only the distinct ones).

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

The square root of 12491816 is about 3534.3763240493. The cubic root of 12491816 is about 232.0287816056.

The spelling of 12491816 in words is "twelve million, four hundred ninety-one thousand, eight hundred sixteen".