13247491 has 2 divisors, whose sum is σ = 13247492. Its totient is φ = 13247490.

The previous prime is 13247477. The next prime is 13247527. The reversal of 13247491 is 19474231.

13247491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13247491 - 2⁷ = 13247363 is a prime.

It is not a weakly prime, because it can be changed into another prime (13247401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6623745 + 6623746.

It is an arithmetic number, because the mean of its divisors is an integer number (6623746).

Almost surely, 2^13247491 is an apocalyptic number.

13247491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13247491 is an equidigital number, since it uses as much as digits as its factorization.

13247491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 13247491 is about 3639.7102906688. The cubic root of 13247491 is about 236.6162375746.

The spelling of 13247491 in words is "thirteen million, two hundred forty-seven thousand, four hundred ninety-one".