74908021 has 8 divisors (see below), whose sum is σ = 76767680. Its totient is φ = 73053792.

The previous prime is 74907991. The next prime is 74908063. The reversal of 74908021 is 12080947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74908021 - 2⁷ = 74907893 is a prime.

It is a super-2 number, since 2×74908021² = 11222423220272882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74908721) 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 7 ways as a sum of consecutive naturals, for example, 47776 + ... + 49318.

It is an arithmetic number, because the mean of its divisors is an integer number (9595960).

Almost surely, 2^74908021 is an apocalyptic number.

It is an amenable number.

74908021 is a deficient number, since it is larger than the sum of its proper divisors (1859659).

74908021 is a wasteful number, since it uses less digits than its factorization.

74908021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 74908021 is about 8654.9419986503. The cubic root of 74908021 is about 421.5438663657.

Adding to 74908021 its reverse (12080947), we get a palindrome (86988968).

The spelling of 74908021 in words is "seventy-four million, nine hundred eight thousand, twenty-one".