75021957 has 20 divisors (see below), whose sum is σ = 113430240. Its totient is φ = 49407624.

The previous prime is 75021949. The next prime is 75021967. The reversal of 75021957 is 75912057.

It is not a de Polignac number, because 75021957 - 2³ = 75021949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75021907) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1144 + ... + 12302.

It is an arithmetic number, because the mean of its divisors is an integer number (5671512).

Almost surely, 2^75021957 is an apocalyptic number.

It is an amenable number.

75021957 is a deficient number, since it is larger than the sum of its proper divisors (38408283).

75021957 is a wasteful number, since it uses less digits than its factorization.

75021957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11254 (or 11245 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 75021957 is about 8661.5216330619. The cubic root of 75021957 is about 421.7574825266.

The spelling of 75021957 in words is "seventy-five million, twenty-one thousand, nine hundred fifty-seven".