975164521 has 4 divisors (see below), whose sum is σ = 975305044. Its totient is φ = 975024000.

The previous prime is 975164501. The next prime is 975164537. The reversal of 975164521 is 125461579.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 237498921 + 737665600 = 15411^2 + 27160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-975164521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (975164501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59280 + ... + 73921.

It is an arithmetic number, because the mean of its divisors is an integer number (243826261).

Almost surely, 2^975164521 is an apocalyptic number.

It is an amenable number.

975164521 is a deficient number, since it is larger than the sum of its proper divisors (140523).

975164521 is a wasteful number, since it uses less digits than its factorization.

975164521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140522.

The product of its digits is 75600, while the sum is 40.

The square root of 975164521 is about 31227.6243252669. The cubic root of 975164521 is about 991.6520120174.

The spelling of 975164521 in words is "nine hundred seventy-five million, one hundred sixty-four thousand, five hundred twenty-one".