975921 has 4 divisors (see below), whose sum is σ = 1301232. Its totient is φ = 650612.

The previous prime is 975907. The next prime is 975941. The reversal of 975921 is 129579.

975921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 975921 - 2⁶ = 975857 is a prime.

It is a D-number.

It is a Curzon number.

975921 is a lucky number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 975921.

It is not an unprimeable number, because it can be changed into a prime (975901) 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, 162651 + ... + 162656.

It is an arithmetic number, because the mean of its divisors is an integer number (325308).

2⁹⁷⁵⁹²¹ is an apocalyptic number.

It is an amenable number.

975921 is a deficient number, since it is larger than the sum of its proper divisors (325311).

975921 is a wasteful number, since it uses less digits than its factorization.

975921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325310.

The product of its digits is 5670, while the sum is 33.

The square root of 975921 is about 987.8871393029. The cubic root of 975921 is about 99.1908368769.

The spelling of 975921 in words is "nine hundred seventy-five thousand, nine hundred twenty-one".