74523 has 4 divisors (see below), whose sum is σ = 99368. Its totient is φ = 49680.

The previous prime is 74521. The next prime is 74527. The reversal of 74523 is 32547.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 74523 - 2¹ = 74521 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74523.

It is not an unprimeable number, because it can be changed into a prime (74521) 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, 12418 + ... + 12423.

It is an arithmetic number, because the mean of its divisors is an integer number (24842).

2⁷⁴⁵²³ is an apocalyptic number.

74523 is a deficient number, since it is larger than the sum of its proper divisors (24845).

74523 is a wasteful number, since it uses less digits than its factorization.

74523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24844.

The product of its digits is 840, while the sum is 21.

The square root of 74523 is about 272.9890107678. The cubic root of 74523 is about 42.0820391938.

The spelling of 74523 in words is "seventy-four thousand, five hundred twenty-three".