74498421 has 4 divisors (see below), whose sum is σ = 99331232. Its totient is φ = 49665612.

The previous prime is 74498407. The next prime is 74498423. The reversal of 74498421 is 12489447.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12489447 = 3 ⋅4163149.

It is not a de Polignac number, because 74498421 - 2¹⁵ = 74465653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74498421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74498423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12416401 + ... + 12416406.

It is an arithmetic number, because the mean of its divisors is an integer number (24832808).

Almost surely, 2^74498421 is an apocalyptic number.

It is an amenable number.

74498421 is a deficient number, since it is larger than the sum of its proper divisors (24832811).

74498421 is a wasteful number, since it uses less digits than its factorization.

74498421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24832810.

The product of its digits is 64512, while the sum is 39.

The square root of 74498421 is about 8631.2467813173. The cubic root of 74498421 is about 420.7741221882.

The spelling of 74498421 in words is "seventy-four million, four hundred ninety-eight thousand, four hundred twenty-one".