74942421 has 16 divisors (see below), whose sum is σ = 102527040. Its totient is φ = 48666240.

The previous prime is 74942411. The next prime is 74942437. The reversal of 74942421 is 12424947.

It is not a de Polignac number, because 74942421 - 2¹⁰ = 74941397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74942401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72891 + ... + 73911.

It is an arithmetic number, because the mean of its divisors is an integer number (6407940).

Almost surely, 2^74942421 is an apocalyptic number.

It is an amenable number.

74942421 is a deficient number, since it is larger than the sum of its proper divisors (27584619).

74942421 is a wasteful number, since it uses less digits than its factorization.

74942421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636.

The product of its digits is 16128, while the sum is 33.

The square root of 74942421 is about 8656.9290744467. The cubic root of 74942421 is about 421.6083850007.

The spelling of 74942421 in words is "seventy-four million, nine hundred forty-two thousand, four hundred twenty-one".