74802281 has 4 divisors (see below), whose sum is σ = 77381700. Its totient is φ = 72222864.

The previous prime is 74802269. The next prime is 74802283. The reversal of 74802281 is 18220847.

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 62552281 + 12250000 = 7909^2 + 3500^2 .

It is a cyclic number.

It is not a de Polignac number, because 74802281 - 2¹⁰ = 74801257 is a prime.

It is a super-2 number, since 2×74802281² = 11190762485605922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74802283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289666 + ... + 1289723.

It is an arithmetic number, because the mean of its divisors is an integer number (19345425).

Almost surely, 2^74802281 is an apocalyptic number.

It is an amenable number.

74802281 is a deficient number, since it is larger than the sum of its proper divisors (2579419).

74802281 is a wasteful number, since it uses less digits than its factorization.

74802281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579418.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 74802281 is about 8648.8311927104. The cubic root of 74802281 is about 421.3454228264.

The spelling of 74802281 in words is "seventy-four million, eight hundred two thousand, two hundred eighty-one".