75390725 has 12 divisors (see below), whose sum is σ = 93910656. Its totient is φ = 60037680.

The previous prime is 75390713. The next prime is 75390737. The reversal of 75390725 is 52709357.

It is an interprime number because it is at equal distance from previous prime (75390713) and next prime (75390737).

It is not a de Polignac number, because 75390725 - 2⁴ = 75390709 is a prime.

It is a super-2 number, since 2×75390725² = 11367522832051250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1187 + ... + 12336.

It is an arithmetic number, because the mean of its divisors is an integer number (7825888).

Almost surely, 2^75390725 is an apocalyptic number.

It is an amenable number.

75390725 is a deficient number, since it is larger than the sum of its proper divisors (18519931).

75390725 is a wasteful number, since it uses less digits than its factorization.

75390725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13756 (or 13751 counting only the distinct ones).

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 75390725 is about 8682.7832519302. The cubic root of 75390725 is about 422.4473984208.

The spelling of 75390725 in words is "seventy-five million, three hundred ninety thousand, seven hundred twenty-five".