75920725 has 24 divisors (see below), whose sum is σ = 102134088. Its totient is φ = 55756800.

The previous prime is 75920717. The next prime is 75920729. The reversal of 75920725 is 52702957.

It can be written as a sum of positive squares in 12 ways, for example, as 6265009 + 69655716 = 2503^2 + 8346^2 .

It is not a de Polignac number, because 75920725 - 2³ = 75920717 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75920729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15247 + ... + 19603.

It is an arithmetic number, because the mean of its divisors is an integer number (4255587).

Almost surely, 2^75920725 is an apocalyptic number.

75920725 is the 4357-th decagonal number.

It is an amenable number.

75920725 is a deficient number, since it is larger than the sum of its proper divisors (26213363).

75920725 is a wasteful number, since it uses less digits than its factorization.

75920725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425 (or 4420 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 75920725 is about 8713.2499677216. The cubic root of 75920725 is about 423.4350287161.

The spelling of 75920725 in words is "seventy-five million, nine hundred twenty thousand, seven hundred twenty-five".