74498521 has 4 divisors (see below), whose sum is σ = 75067344. Its totient is φ = 73929700.

The previous prime is 74498513. The next prime is 74498551. The reversal of 74498521 is 12589447.

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: 12589447 = 13 ⋅968419.

It is a cyclic number.

It is not a de Polignac number, because 74498521 - 2³ = 74498513 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74498551) 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, 284215 + ... + 284476.

It is an arithmetic number, because the mean of its divisors is an integer number (18766836).

Almost surely, 2^74498521 is an apocalyptic number.

It is an amenable number.

74498521 is a deficient number, since it is larger than the sum of its proper divisors (568823).

74498521 is a wasteful number, since it uses less digits than its factorization.

74498521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568822.

The product of its digits is 80640, while the sum is 40.

The square root of 74498521 is about 8631.2525742212. The cubic root of 74498521 is about 420.7743104579.

The spelling of 74498521 in words is "seventy-four million, four hundred ninety-eight thousand, five hundred twenty-one".