40520725 has 12 divisors (see below), whose sum is σ = 57423904. Its totient is φ = 27785520.

The previous prime is 40520717. The next prime is 40520737. The reversal of 40520725 is 52702504.

It is not a de Polignac number, because 40520725 - 2³ = 40520717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40520725.

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 11 ways as a sum of consecutive naturals, for example, 115599 + ... + 115948.

Almost surely, 2^40520725 is an apocalyptic number.

It is an amenable number.

40520725 is a deficient number, since it is larger than the sum of its proper divisors (16903179).

40520725 is a wasteful number, since it uses less digits than its factorization.

40520725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231564 (or 231559 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 40520725 is about 6365.5891322014. The cubic root of 40520725 is about 343.4728410550.

The spelling of 40520725 in words is "forty million, five hundred twenty thousand, seven hundred twenty-five".