74539 has 4 divisors (see below), whose sum is σ = 75240. Its totient is φ = 73840.

The previous prime is 74531. The next prime is 74551. The reversal of 74539 is 93547.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93547 = 139 ⋅673.

It is a cyclic number.

It is not a de Polignac number, because 74539 - 2³ = 74531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74531) 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, 154 + ... + 415.

It is an arithmetic number, because the mean of its divisors is an integer number (18810).

2⁷⁴⁵³⁹ is an apocalyptic number.

74539 is a deficient number, since it is larger than the sum of its proper divisors (701).

74539 is a wasteful number, since it uses less digits than its factorization.

74539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700.

The product of its digits is 3780, while the sum is 28.

The square root of 74539 is about 273.0183144040. The cubic root of 74539 is about 42.0850506330.

It can be divided in two parts, 745 and 39, that added together give a square (784 = 28²).

The spelling of 74539 in words is "seventy-four thousand, five hundred thirty-nine".