74792521 has 4 divisors (see below), whose sum is σ = 74909844. Its totient is φ = 74675200.

The previous prime is 74792513. The next prime is 74792551. The reversal of 74792521 is 12529747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12529747 = 367 ⋅34141.

It can be written as a sum of positive squares in 2 ways, for example, as 71318025 + 3474496 = 8445^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 74792521 - 2³ = 74792513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74792551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57700 + ... + 58981.

It is an arithmetic number, because the mean of its divisors is an integer number (18727461).

Almost surely, 2^74792521 is an apocalyptic number.

It is an amenable number.

74792521 is a deficient number, since it is larger than the sum of its proper divisors (117323).

74792521 is a wasteful number, since it uses less digits than its factorization.

74792521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117322.

The product of its digits is 35280, while the sum is 37.

The square root of 74792521 is about 8648.2669362133. The cubic root of 74792521 is about 421.3270966909.

It can be divided in two parts, 7479 and 2521, that added together give a 4-th power (10000 = 10⁴).

The spelling of 74792521 in words is "seventy-four million, seven hundred ninety-two thousand, five hundred twenty-one".