12699491 has 16 divisors (see below), whose sum is σ = 15341568. Its totient is φ = 10281600.

The previous prime is 12699469. The next prime is 12699497. The reversal of 12699491 is 19499621.

It is a happy number.

12699491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12699491 - 2²² = 8505187 is a prime.

It is a super-2 number, since 2×12699491² = 322554143318162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12699497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8651 + ... + 10011.

It is an arithmetic number, because the mean of its divisors is an integer number (958848).

Almost surely, 2^12699491 is an apocalyptic number.

12699491 is a deficient number, since it is larger than the sum of its proper divisors (2642077).

12699491 is a wasteful number, since it uses less digits than its factorization.

12699491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442.

The product of its digits is 34992, while the sum is 41.

The square root of 12699491 is about 3563.6345211034. The cubic root of 12699491 is about 233.3075384183.

The spelling of 12699491 in words is "twelve million, six hundred ninety-nine thousand, four hundred ninety-one".