971025921 has 16 divisors (see below), whose sum is σ = 1443651520. Its totient is φ = 645058080.

The previous prime is 971025883. The next prime is 971025929. The reversal of 971025921 is 129520179.

It is not a de Polignac number, because 971025921 - 2⁶ = 971025857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971025929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55900 + ... + 71181.

It is an arithmetic number, because the mean of its divisors is an integer number (90228220).

Almost surely, 2^971025921 is an apocalyptic number.

It is an amenable number.

971025921 is a deficient number, since it is larger than the sum of its proper divisors (472625599).

971025921 is a wasteful number, since it uses less digits than its factorization.

971025921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127373 (or 127367 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 971025921 is about 31161.2888212282. The cubic root of 971025921 is about 990.2471651008.

The spelling of 971025921 in words is "nine hundred seventy-one million, twenty-five thousand, nine hundred twenty-one".