74774281 has 4 divisors (see below), whose sum is σ = 74855700. Its totient is φ = 74692864.

The previous prime is 74774269. The next prime is 74774333. The reversal of 74774281 is 18247747.

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 37319881 + 37454400 = 6109^2 + 6120^2 .

It is a cyclic number.

It is not a de Polignac number, because 74774281 - 2⁷ = 74774153 is a prime.

It is a super-2 number, since 2×74774281² = 11182386198133922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74774251) 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, 39316 + ... + 41173.

It is an arithmetic number, because the mean of its divisors is an integer number (18713925).

Almost surely, 2^74774281 is an apocalyptic number.

It is an amenable number.

74774281 is a deficient number, since it is larger than the sum of its proper divisors (81419).

74774281 is an equidigital number, since it uses as much as digits as its factorization.

74774281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81418.

The product of its digits is 87808, while the sum is 40.

The square root of 74774281 is about 8647.2123253682. The cubic root of 74774281 is about 421.2928435733.

The spelling of 74774281 in words is "seventy-four million, seven hundred seventy-four thousand, two hundred eighty-one".