74491 has 4 divisors (see below), whose sum is σ = 75112. Its totient is φ = 73872.

The previous prime is 74489. The next prime is 74507. The reversal of 74491 is 19447.

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 is a cyclic number.

It is not a de Polignac number, because 74491 - 2¹ = 74489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74411) 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, 66 + ... + 391.

It is an arithmetic number, because the mean of its divisors is an integer number (18778).

2⁷⁴⁴⁹¹ is an apocalyptic number.

74491 is a deficient number, since it is larger than the sum of its proper divisors (621).

74491 is a wasteful number, since it uses less digits than its factorization.

74491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its digits is 1008, while the sum is 25.

The square root of 74491 is about 272.9303940568. The cubic root of 74491 is about 42.0760150221.

It can be divided in two parts, 74 and 491, that added together give a palindrome (565).

The spelling of 74491 in words is "seventy-four thousand, four hundred ninety-one".