74981 has 4 divisors (see below), whose sum is σ = 75852. Its totient is φ = 74112.

The previous prime is 74959. The next prime is 75011. The reversal of 74981 is 18947.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16900 + 58081 = 130^2 + 241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74981 is a prime.

It is a super-2 number, since 2×74981² = 11244300722, which contains 22 as substring.

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

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74941) 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, 290 + ... + 483.

It is an arithmetic number, because the mean of its divisors is an integer number (18963).

2⁷⁴⁹⁸¹ is an apocalyptic number.

It is an amenable number.

74981 is a deficient number, since it is larger than the sum of its proper divisors (871).

74981 is an equidigital number, since it uses as much as digits as its factorization.

74981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its digits is 2016, while the sum is 29.

The square root of 74981 is about 273.8265874600. The cubic root of 74981 is about 42.1680718042.

The spelling of 74981 in words is "seventy-four thousand, nine hundred eighty-one".