1164161521 has 4 divisors (see below), whose sum is σ = 1225433200. Its totient is φ = 1102889844.

The previous prime is 1164161501. The next prime is 1164161527. The reversal of 1164161521 is 1251614611.

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 not a de Polignac number, because 1164161521 - 2²⁵ = 1130607089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1164161521.

It is not an unprimeable number, because it can be changed into a prime (1164161527) 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, 30635811 + ... + 30635848.

It is an arithmetic number, because the mean of its divisors is an integer number (306358300).

Almost surely, 2^1164161521 is an apocalyptic number.

It is an amenable number.

1164161521 is a deficient number, since it is larger than the sum of its proper divisors (61271679).

1164161521 is an equidigital number, since it uses as much as digits as its factorization.

1164161521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61271678.

The product of its digits is 1440, while the sum is 28.

The square root of 1164161521 is about 34119.8112685284. The cubic root of 1164161521 is about 1051.9725643666.

The spelling of 1164161521 in words is "one billion, one hundred sixty-four million, one hundred sixty-one thousand, five hundred twenty-one".