74298521 has 4 divisors (see below), whose sum is σ = 81052944. Its totient is φ = 67544100.

The previous prime is 74298503. The next prime is 74298541. The reversal of 74298521 is 12589247.

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: 12589247 = 11 ⋅1144477.

It is a cyclic number.

It is not a de Polignac number, because 74298521 - 2⁶ = 74298457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74298541) 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, 3377195 + ... + 3377216.

It is an arithmetic number, because the mean of its divisors is an integer number (20263236).

Almost surely, 2^74298521 is an apocalyptic number.

It is an amenable number.

74298521 is a deficient number, since it is larger than the sum of its proper divisors (6754423).

74298521 is a wasteful number, since it uses less digits than its factorization.

74298521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6754422.

The product of its digits is 40320, while the sum is 38.

The square root of 74298521 is about 8619.6589839738. The cubic root of 74298521 is about 420.3974337032.

The spelling of 74298521 in words is "seventy-four million, two hundred ninety-eight thousand, five hundred twenty-one".