1156527161 has 4 divisors (see below), whose sum is σ = 1156652112. Its totient is φ = 1156402212.

The previous prime is 1156527109. The next prime is 1156527223. The reversal of 1156527161 is 1617256511.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156527161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156527061) 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, 47375 + ... + 67508.

It is an arithmetic number, because the mean of its divisors is an integer number (289163028).

Almost surely, 2^1156527161 is an apocalyptic number.

It is an amenable number.

1156527161 is a deficient number, since it is larger than the sum of its proper divisors (124951).

1156527161 is a wasteful number, since it uses less digits than its factorization.

1156527161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124950.

The product of its digits is 12600, while the sum is 35.

The square root of 1156527161 is about 34007.7514840367. The cubic root of 1156527161 is about 1049.6679709056.

The spelling of 1156527161 in words is "one billion, one hundred fifty-six million, five hundred twenty-seven thousand, one hundred sixty-one".