74956521 has 8 divisors (see below), whose sum is σ = 99982080. Its totient is φ = 49950992.

The previous prime is 74956507. The next prime is 74956549. The reversal of 74956521 is 12565947.

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

It is a cyclic number.

It is not a de Polignac number, because 74956521 - 2⁵ = 74956489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74956521.

It is not an unprimeable number, because it can be changed into a prime (74956421) 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, 11560 + ... + 16838.

It is an arithmetic number, because the mean of its divisors is an integer number (12497760).

Almost surely, 2^74956521 is an apocalyptic number.

It is an amenable number.

74956521 is a deficient number, since it is larger than the sum of its proper divisors (25025559).

74956521 is a wasteful number, since it uses less digits than its factorization.

74956521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10015.

The product of its digits is 75600, while the sum is 39.

The square root of 74956521 is about 8657.7434126913. The cubic root of 74956521 is about 421.6348244341.

The spelling of 74956521 in words is "seventy-four million, nine hundred fifty-six thousand, five hundred twenty-one".