73521425 has 6 divisors (see below), whose sum is σ = 91166598. Its totient is φ = 58817120.

The previous prime is 73521407. The next prime is 73521433. The reversal of 73521425 is 52412537.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1203409 + 72318016 = 1097^2 + 8504^2 .

It is not a de Polignac number, because 73521425 - 2⁸ = 73521169 is a prime.

It is a Duffinian 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, 1470404 + ... + 1470453.

It is an arithmetic number, because the mean of its divisors is an integer number (15194433).

Almost surely, 2^73521425 is an apocalyptic number.

It is an amenable number.

73521425 is a deficient number, since it is larger than the sum of its proper divisors (17645173).

73521425 is a wasteful number, since it uses less digits than its factorization.

73521425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940867 (or 2940862 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 73521425 is about 8574.4635400706. The cubic root of 73521425 is about 418.9266337331.

The spelling of 73521425 in words is "seventy-three million, five hundred twenty-one thousand, four hundred twenty-five".