13120947 has 40 divisors (see below), whose sum is σ = 22778976. Its totient is φ = 7371648.

The previous prime is 13120909. The next prime is 13120949. The reversal of 13120947 is 74902131.

13120947 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 13120947 - 2⁶ = 13120883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 13120947.

It is not an unprimeable number, because it can be changed into a prime (13120949) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 41233 + ... + 41549.

Almost surely, 2^13120947 is an apocalyptic number.

13120947 is a deficient number, since it is larger than the sum of its proper divisors (9658029).

13120947 is an equidigital number, since it uses as much as digits as its factorization.

13120947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 13120947 is about 3622.2847762151. The cubic root of 13120947 is about 235.8604161178.

The spelling of 13120947 in words is "thirteen million, one hundred twenty thousand, nine hundred forty-seven".