74173421 has 8 divisors (see below), whose sum is σ = 87504384. Its totient is φ = 61526160.

The previous prime is 74173399. The next prime is 74173423. The reversal of 74173421 is 12437147.

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 74173421 - 2²⁶ = 7064557 is a prime.

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 (74173423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170690 + ... + 171123.

It is an arithmetic number, because the mean of its divisors is an integer number (10938048).

Almost surely, 2^74173421 is an apocalyptic number.

It is an amenable number.

74173421 is a deficient number, since it is larger than the sum of its proper divisors (13330963).

74173421 is a wasteful number, since it uses less digits than its factorization.

74173421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341851.

The product of its digits is 4704, while the sum is 29.

The square root of 74173421 is about 8612.3992592076. The cubic root of 74173421 is about 420.1613533481.

The spelling of 74173421 in words is "seventy-four million, one hundred seventy-three thousand, four hundred twenty-one".