74520517 has 8 divisors (see below), whose sum is σ = 78148440. Its totient is φ = 70963200.

The previous prime is 74520499. The next prime is 74520539. The reversal of 74520517 is 71502547.

It can be written as a sum of positive squares in 4 ways, for example, as 15752961 + 58767556 = 3969^2 + 7666^2 .

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 74520517 - 2¹¹ = 74518469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74520557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15484 + ... + 19717.

It is an arithmetic number, because the mean of its divisors is an integer number (9768555).

Almost surely, 2^74520517 is an apocalyptic number.

It is an amenable number.

74520517 is a deficient number, since it is larger than the sum of its proper divisors (3627923).

74520517 is a wasteful number, since it uses less digits than its factorization.

74520517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35303.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 74520517 is about 8632.5266868976. The cubic root of 74520517 is about 420.8157181748.

The spelling of 74520517 in words is "seventy-four million, five hundred twenty thousand, five hundred seventeen".