74477421 has 16 divisors (see below), whose sum is σ = 110513920. Its totient is φ = 49572000.

The previous prime is 74477413. The next prime is 74477437. The reversal of 74477421 is 12477447.

It is not a de Polignac number, because 74477421 - 2³ = 74477413 is a prime.

It is a super-2 number, since 2×74477421² = 11093772477622482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74477621) 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, 18441 + ... + 22113.

It is an arithmetic number, because the mean of its divisors is an integer number (6907120).

Almost surely, 2^74477421 is an apocalyptic number.

It is an amenable number.

74477421 is a deficient number, since it is larger than the sum of its proper divisors (36036499).

74477421 is a wasteful number, since it uses less digits than its factorization.

74477421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433 (or 4427 counting only the distinct ones).

The product of its digits is 43904, while the sum is 36.

The square root of 74477421 is about 8630.0301853470. The cubic root of 74477421 is about 420.7345818112.

The spelling of 74477421 in words is "seventy-four million, four hundred seventy-seven thousand, four hundred twenty-one".