74520345 has 32 divisors (see below), whose sum is σ = 126491904. Its totient is φ = 37382400.

The previous prime is 74520319. The next prime is 74520349. The reversal of 74520345 is 54302547.

It is not a de Polignac number, because 74520345 - 2⁷ = 74520217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74520349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19275 + ... + 22815.

It is an arithmetic number, because the mean of its divisors is an integer number (3952872).

Almost surely, 2^74520345 is an apocalyptic number.

It is an amenable number.

74520345 is a deficient number, since it is larger than the sum of its proper divisors (51971559).

74520345 is a wasteful number, since it uses less digits than its factorization.

74520345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 74520345 is about 8632.5167245711. The cubic root of 74520345 is about 420.8153944144.

The spelling of 74520345 in words is "seventy-four million, five hundred twenty thousand, three hundred forty-five".