1156975161 has 8 divisors (see below), whose sum is σ = 1542907200. Its totient is φ = 771179952.

The previous prime is 1156975147. The next prime is 1156975177. The reversal of 1156975161 is 1615796511.

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

It is not a de Polignac number, because 1156975161 - 2⁵ = 1156975129 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1156975121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12510 + ... + 49703.

It is an arithmetic number, because the mean of its divisors is an integer number (192863400).

Almost surely, 2^1156975161 is an apocalyptic number.

It is an amenable number.

1156975161 is a deficient number, since it is larger than the sum of its proper divisors (385932039).

1156975161 is an equidigital number, since it uses as much as digits as its factorization.

1156975161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68415.

The product of its digits is 56700, while the sum is 42.

The square root of 1156975161 is about 34014.3375799089. The cubic root of 1156975161 is about 1049.8034888481.

The spelling of 1156975161 in words is "one billion, one hundred fifty-six million, nine hundred seventy-five thousand, one hundred sixty-one".