13161281 has 16 divisors (see below), whose sum is σ = 16767360. Its totient is φ = 10056960.

The previous prime is 13161277. The next prime is 13161283. The reversal of 13161281 is 18216131.

It is a cyclic number.

It is not a de Polignac number, because 13161281 - 2² = 13161277 is a prime.

It is a super-2 number, since 2×13161281² = 346438635121922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13161283) 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, 650 + ... + 5171.

It is an arithmetic number, because the mean of its divisors is an integer number (1047960).

Almost surely, 2^13161281 is an apocalyptic number.

It is an amenable number.

13161281 is a deficient number, since it is larger than the sum of its proper divisors (3606079).

13161281 is a wasteful number, since it uses less digits than its factorization.

13161281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5864.

The product of its digits is 288, while the sum is 23.

The square root of 13161281 is about 3627.8479846873. The cubic root of 13161281 is about 236.1018484558.

The spelling of 13161281 in words is "thirteen million, one hundred sixty-one thousand, two hundred eighty-one".