13161965 has 8 divisors (see below), whose sum is σ = 16625760. Its totient is φ = 9975312.

The previous prime is 13161931. The next prime is 13161971. The reversal of 13161965 is 56916131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13161965 - 2¹² = 13157869 is a prime.

It is a super-2 number, since 2×13161965² = 346474645322450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69179 + ... + 69368.

It is an arithmetic number, because the mean of its divisors is an integer number (2078220).

Almost surely, 2^13161965 is an apocalyptic number.

It is an amenable number.

13161965 is a deficient number, since it is larger than the sum of its proper divisors (3463795).

13161965 is a wasteful number, since it uses less digits than its factorization.

13161965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138571.

The product of its digits is 4860, while the sum is 32.

The square root of 13161965 is about 3627.9422542262. The cubic root of 13161965 is about 236.1059385052.

The spelling of 13161965 in words is "thirteen million, one hundred sixty-one thousand, nine hundred sixty-five".