75424257 has 32 divisors (see below), whose sum is σ = 119986560. Its totient is φ = 46656000.

The previous prime is 75424253. The next prime is 75424277. The reversal of 75424257 is 75242457.

It is a happy number.

It is not a de Polignac number, because 75424257 - 2² = 75424253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75424253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32382 + ... + 34632.

It is an arithmetic number, because the mean of its divisors is an integer number (3749580).

Almost surely, 2^75424257 is an apocalyptic number.

It is an amenable number.

75424257 is a deficient number, since it is larger than the sum of its proper divisors (44562303).

75424257 is a wasteful number, since it uses less digits than its factorization.

75424257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350 (or 2344 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 75424257 is about 8684.7139849278. The cubic root of 75424257 is about 422.5100206533.

The spelling of 75424257 in words is "seventy-five million, four hundred twenty-four thousand, two hundred fifty-seven".