75307725 has 30 divisors (see below), whose sum is σ = 139499690. Its totient is φ = 40163040.

The previous prime is 75307723. The next prime is 75307763. The reversal of 75307725 is 52770357.

It can be written as a sum of positive squares in 3 ways, for example, as 15539364 + 59768361 = 3942^2 + 7731^2 .

It is not a de Polignac number, because 75307725 - 2¹ = 75307723 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 75307725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75307723) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 16570 + ... + 20619.

Almost surely, 2^75307725 is an apocalyptic number.

75307725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

75307725 is a deficient number, since it is larger than the sum of its proper divisors (64191965).

75307725 is a wasteful number, since it uses less digits than its factorization.

75307725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37211 (or 37197 counting only the distinct ones).

The product of its (nonzero) digits is 51450, while the sum is 36.

The square root of 75307725 is about 8678.0023622951. The cubic root of 75307725 is about 422.2923129895.

The spelling of 75307725 in words is "seventy-five million, three hundred seven thousand, seven hundred twenty-five".