127956161 has 4 divisors (see below), whose sum is σ = 135483012. Its totient is φ = 120429312.

The previous prime is 127956133. The next prime is 127956167. The reversal of 127956161 is 161659721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161659721 = 113 ⋅1430617.

It can be written as a sum of positive squares in 2 ways, for example, as 109077136 + 18879025 = 10444^2 + 4345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127956161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127956167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3763400 + ... + 3763433.

It is an arithmetic number, because the mean of its divisors is an integer number (33870753).

Almost surely, 2^127956161 is an apocalyptic number.

It is an amenable number.

127956161 is a deficient number, since it is larger than the sum of its proper divisors (7526851).

127956161 is an equidigital number, since it uses as much as digits as its factorization.

127956161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7526850.

The product of its digits is 22680, while the sum is 38.

The square root of 127956161 is about 11311.7709046815. The cubic root of 127956161 is about 503.9108783061.

The spelling of 127956161 in words is "one hundred twenty-seven million, nine hundred fifty-six thousand, one hundred sixty-one".