74525521 has 12 divisors (see below), whose sum is σ = 87037632. Its totient is φ = 63625128.

The previous prime is 74525513. The next prime is 74525527. The reversal of 74525521 is 12552547.

It is not a de Polignac number, because 74525521 - 2³ = 74525513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74525527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9996 + ... + 15778.

It is an arithmetic number, because the mean of its divisors is an integer number (7253136).

Almost surely, 2^74525521 is an apocalyptic number.

It is an amenable number.

74525521 is a deficient number, since it is larger than the sum of its proper divisors (12512111).

74525521 is a wasteful number, since it uses less digits than its factorization.

74525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060 (or 6053 counting only the distinct ones).

The product of its digits is 14000, while the sum is 31.

The square root of 74525521 is about 8632.8165160624. The cubic root of 74525521 is about 420.8251371232.

The spelling of 74525521 in words is "seventy-four million, five hundred twenty-five thousand, five hundred twenty-one".