72507725 has 6 divisors (see below), whose sum is σ = 89909610. Its totient is φ = 58006160.

The previous prime is 72507697. The next prime is 72507733. The reversal of 72507725 is 52770527.

It can be written as a sum of positive squares in 3 ways, for example, as 25694761 + 46812964 = 5069^2 + 6842^2 .

It is not a de Polignac number, because 72507725 - 2¹⁰ = 72506701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1450130 + ... + 1450179.

It is an arithmetic number, because the mean of its divisors is an integer number (14984935).

Almost surely, 2^72507725 is an apocalyptic number.

It is an amenable number.

72507725 is a deficient number, since it is larger than the sum of its proper divisors (17401885).

72507725 is a wasteful number, since it uses less digits than its factorization.

72507725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900319 (or 2900314 counting only the distinct ones).

The product of its (nonzero) digits is 34300, while the sum is 35.

The square root of 72507725 is about 8515.1467984997. The cubic root of 72507725 is about 416.9923551363.

The spelling of 72507725 in words is "seventy-two million, five hundred seven thousand, seven hundred twenty-five".