74745 has 24 divisors (see below), whose sum is σ = 142272. Its totient is φ = 36000.

The previous prime is 74731. The next prime is 74747. The reversal of 74745 is 54747.

It is not a de Polignac number, because 74745 - 2⁴ = 74729 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 420 + ... + 570.

It is an arithmetic number, because the mean of its divisors is an integer number (5928).

2⁷⁴⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

74745 is a deficient number, since it is larger than the sum of its proper divisors (67527).

74745 is a wasteful number, since it uses less digits than its factorization.

74745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 170 counting only the distinct ones).

The product of its digits is 3920, while the sum is 27.

The square root of 74745 is about 273.3953181750. The cubic root of 74745 is about 42.1237844777.

The spelling of 74745 in words is "seventy-four thousand, seven hundred forty-five".