74076521 has 4 divisors (see below), whose sum is σ = 74120532. Its totient is φ = 74032512.

The previous prime is 74076503. The next prime is 74076529. The reversal of 74076521 is 12567047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12567047 = 821 ⋅15307.

It can be written as a sum of positive squares in 2 ways, for example, as 16483600 + 57592921 = 4060^2 + 7589^2 .

It is a cyclic number.

It is not a de Polignac number, because 74076521 - 2¹⁰ = 74075497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74076529) 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, 19376 + ... + 22881.

It is an arithmetic number, because the mean of its divisors is an integer number (18530133).

Almost surely, 2^74076521 is an apocalyptic number.

It is an amenable number.

74076521 is a deficient number, since it is larger than the sum of its proper divisors (44011).

74076521 is a wasteful number, since it uses less digits than its factorization.

74076521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44010.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 74076521 is about 8606.7718106152. The cubic root of 74076521 is about 419.9783076476.

The spelling of 74076521 in words is "seventy-four million, seventy-six thousand, five hundred twenty-one".