13158961 has 2 divisors, whose sum is σ = 13158962. Its totient is φ = 13158960.

The previous prime is 13158913. The next prime is 13158979. The reversal of 13158961 is 16985131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9333025 + 3825936 = 3055^2 + 1956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13158961 is a prime.

It is not a weakly prime, because it can be changed into another prime (13158361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6579480 + 6579481.

It is an arithmetic number, because the mean of its divisors is an integer number (6579481).

Almost surely, 2^13158961 is an apocalyptic number.

It is an amenable number.

13158961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13158961 is an equidigital number, since it uses as much as digits as its factorization.

13158961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 34.

The square root of 13158961 is about 3627.5282218061. The cubic root of 13158961 is about 236.0879747182.

The spelling of 13158961 in words is "thirteen million, one hundred fifty-eight thousand, nine hundred sixty-one".