74675421 has 6 divisors (see below), whose sum is σ = 107864510. Its totient is φ = 49783608.

The previous prime is 74675417. The next prime is 74675429. The reversal of 74675421 is 12457647.

It can be written as a sum of positive squares in only one way, i.e., 72080100 + 2595321 = 8490^2 + 1611^2 .

It is not a de Polignac number, because 74675421 - 2² = 74675417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74675429) 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, 4148626 + ... + 4148643.

Almost surely, 2^74675421 is an apocalyptic number.

It is an amenable number.

74675421 is a deficient number, since it is larger than the sum of its proper divisors (33189089).

74675421 is a wasteful number, since it uses less digits than its factorization.

74675421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8297275 (or 8297272 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 74675421 is about 8641.4941416401. The cubic root of 74675421 is about 421.1070961998.

It can be divided in two parts, 746 and 75421, that added together give a palindrome (76167).

The spelling of 74675421 in words is "seventy-four million, six hundred seventy-five thousand, four hundred twenty-one".