73504521 has 12 divisors (see below), whose sum is σ = 111761520. Its totient is φ = 46423800.

The previous prime is 73504517. The next prime is 73504537. The reversal of 73504521 is 12540537.

It is a happy number.

It is not a de Polignac number, because 73504521 - 2² = 73504517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73504421) by changing a digit.

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, 214755 + ... + 215096.

It is an arithmetic number, because the mean of its divisors is an integer number (9313460).

Almost surely, 2^73504521 is an apocalyptic number.

It is an amenable number.

73504521 is a deficient number, since it is larger than the sum of its proper divisors (38256999).

73504521 is a wasteful number, since it uses less digits than its factorization.

73504521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429876 (or 429873 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 73504521 is about 8573.4777657611. The cubic root of 73504521 is about 418.8945248224.

The spelling of 73504521 in words is "seventy-three million, five hundred four thousand, five hundred twenty-one".