74902421 has 16 divisors (see below), whose sum is σ = 85926528. Its totient is φ = 64627200.

The previous prime is 74902411. The next prime is 74902433. The reversal of 74902421 is 12420947.

It is a de Polignac number, because none of the positive numbers 2^k-74902421 is a prime.

It is a super-2 number, since 2×74902421² = 11220745343322482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74902411) 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, 33581 + ... + 35741.

It is an arithmetic number, because the mean of its divisors is an integer number (5370408).

Almost surely, 2^74902421 is an apocalyptic number.

It is an amenable number.

74902421 is a deficient number, since it is larger than the sum of its proper divisors (11024107).

74902421 is a wasteful number, since it uses less digits than its factorization.

74902421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 74902421 is about 8654.6184780151. The cubic root of 74902421 is about 421.5333614627.

The spelling of 74902421 in words is "seventy-four million, nine hundred two thousand, four hundred twenty-one".