74537 has 4 divisors (see below), whose sum is σ = 78480. Its totient is φ = 70596.

The previous prime is 74531. The next prime is 74551. The reversal of 74537 is 73547.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74537 - 2⁴ = 74521 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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (19620).

2⁷⁴⁵³⁷ is an apocalyptic number.

It is an amenable number.

74537 is a deficient number, since it is larger than the sum of its proper divisors (3943).

74537 is a wasteful number, since it uses less digits than its factorization.

74537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942.

The product of its digits is 2940, while the sum is 26.

The square root of 74537 is about 273.0146516215. The cubic root of 74537 is about 42.0846742267.

Adding to 74537 its product of digits (2940), we get a palindrome (77477).

Subtracting from 74537 its reverse (73547), we obtain a triangular number (990 = T₄₄).

The spelling of 74537 in words is "seventy-four thousand, five hundred thirty-seven".