13271961 has 4 divisors (see below), whose sum is σ = 17695952. Its totient is φ = 8847972.

The previous prime is 13271957. The next prime is 13271969. The reversal of 13271961 is 16917231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13271961 - 2² = 13271957 is a prime.

It is a super-2 number, since 2×13271961² = 352289897571042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13271969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2211991 + ... + 2211996.

It is an arithmetic number, because the mean of its divisors is an integer number (4423988).

Almost surely, 2^13271961 is an apocalyptic number.

It is an amenable number.

13271961 is a deficient number, since it is larger than the sum of its proper divisors (4423991).

13271961 is an equidigital number, since it uses as much as digits as its factorization.

13271961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4423990.

The product of its digits is 2268, while the sum is 30.

The square root of 13271961 is about 3643.0702710763. The cubic root of 13271961 is about 236.7618359123.

The spelling of 13271961 in words is "thirteen million, two hundred seventy-one thousand, nine hundred sixty-one".