74074521 has 8 divisors (see below), whose sum is σ = 103964320. Its totient is φ = 46783872.

The previous prime is 74074519. The next prime is 74074523. The reversal of 74074521 is 12547047.

It is an interprime number because it is at equal distance from previous prime (74074519) and next prime (74074523).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74074521 - 2¹ = 74074519 is a prime.

It is a super-2 number, since 2×74074521² = 10974069322758882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74074523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649720 + ... + 649833.

It is an arithmetic number, because the mean of its divisors is an integer number (12995540).

Almost surely, 2^74074521 is an apocalyptic number.

It is an amenable number.

74074521 is a deficient number, since it is larger than the sum of its proper divisors (29889799).

74074521 is a wasteful number, since it uses less digits than its factorization.

74074521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299575.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 74074521 is about 8606.6556222496. The cubic root of 74074521 is about 419.9745279337.

The spelling of 74074521 in words is "seventy-four million, seventy-four thousand, five hundred twenty-one".