74845 has 4 divisors (see below), whose sum is σ = 89820. Its totient is φ = 59872.

The previous prime is 74843. The next prime is 74857. The reversal of 74845 is 54847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54847 = 13 ⋅4219.

It can be written as a sum of positive squares in 2 ways, for example, as 8281 + 66564 = 91^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 74845 - 2¹ = 74843 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74843) 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, 7480 + ... + 7489.

It is an arithmetic number, because the mean of its divisors is an integer number (22455).

2⁷⁴⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

74845 is a deficient number, since it is larger than the sum of its proper divisors (14975).

74845 is a wasteful number, since it uses less digits than its factorization.

74845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14974.

The product of its digits is 4480, while the sum is 28.

The square root of 74845 is about 273.5781424018. The cubic root of 74845 is about 42.1425616592.

It can be divided in two parts, 74 and 845, that added together give a palindrome (919).

The spelling of 74845 in words is "seventy-four thousand, eight hundred forty-five".