74122281 has 6 divisors (see below), whose sum is σ = 107065530. Its totient is φ = 49414848.

The previous prime is 74122247. The next prime is 74122291. The reversal of 74122281 is 18222147.

It can be written as a sum of positive squares in only one way, i.e., 58982400 + 15139881 = 7680^2 + 3891^2 .

It is not a de Polignac number, because 74122281 - 2¹⁵ = 74089513 is a prime.

It is a super-2 number, since 2×74122281² = 10988225081285922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74122241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4117896 + ... + 4117913.

It is an arithmetic number, because the mean of its divisors is an integer number (17844255).

Almost surely, 2^74122281 is an apocalyptic number.

It is an amenable number.

74122281 is a deficient number, since it is larger than the sum of its proper divisors (32943249).

74122281 is a wasteful number, since it uses less digits than its factorization.

74122281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8235815 (or 8235812 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 74122281 is about 8609.4297720581. The cubic root of 74122281 is about 420.0647689229.

The spelling of 74122281 in words is "seventy-four million, one hundred twenty-two thousand, two hundred eighty-one".