74224057 has 4 divisors (see below), whose sum is σ = 78590196. Its totient is φ = 69857920.

The previous prime is 74224049. The next prime is 74224061. The reversal of 74224057 is 75042247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75042247 = 7 ⋅10720321.

It can be written as a sum of positive squares in 2 ways, for example, as 46566976 + 27657081 = 6824^2 + 5259^2 .

It is a cyclic number.

It is not a de Polignac number, because 74224057 - 2³ = 74224049 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74224027) 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, 2183044 + ... + 2183077.

It is an arithmetic number, because the mean of its divisors is an integer number (19647549).

Almost surely, 2^74224057 is an apocalyptic number.

It is an amenable number.

74224057 is a deficient number, since it is larger than the sum of its proper divisors (4366139).

74224057 is a wasteful number, since it uses less digits than its factorization.

74224057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366138.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 74224057 is about 8615.3384727473. The cubic root of 74224057 is about 420.2569421745.

The spelling of 74224057 in words is "seventy-four million, two hundred twenty-four thousand, fifty-seven".