74513 has 4 divisors (see below), whose sum is σ = 75060. Its totient is φ = 73968.

The previous prime is 74509. The next prime is 74521. The reversal of 74513 is 31547.

It is a happy number.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 8464 + 66049 = 92^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 74513 - 2² = 74509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74573) 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, 131 + ... + 407.

It is an arithmetic number, because the mean of its divisors is an integer number (18765).

2⁷⁴⁵¹³ is an apocalyptic number.

It is an amenable number.

74513 is a deficient number, since it is larger than the sum of its proper divisors (547).

74513 is a wasteful number, since it uses less digits than its factorization.

74513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546.

The product of its digits is 420, while the sum is 20.

The square root of 74513 is about 272.9706943978. The cubic root of 74513 is about 42.0801568255.

The spelling of 74513 in words is "seventy-four thousand, five hundred thirteen".