75145172 has 12 divisors (see below), whose sum is σ = 132084960. Its totient is φ = 37406616.

The previous prime is 75145141. The next prime is 75145181. The reversal of 75145172 is 27154157.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40472 + ... + 42287.

It is an arithmetic number, because the mean of its divisors is an integer number (11007080).

Almost surely, 2^75145172 is an apocalyptic number.

It is an amenable number.

75145172 is a deficient number, since it is larger than the sum of its proper divisors (56939788).

75145172 is a wasteful number, since it uses less digits than its factorization.

75145172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82990 (or 82988 counting only the distinct ones).

The product of its digits is 9800, while the sum is 32.

The square root of 75145172 is about 8668.6314952246. The cubic root of 75145172 is about 421.9882524076.

The spelling of 75145172 in words is "seventy-five million, one hundred forty-five thousand, one hundred seventy-two".