74745217 has 8 divisors (see below), whose sum is σ = 77196392. Its totient is φ = 72316800.

The previous prime is 74745199. The next prime is 74745263. The reversal of 74745217 is 71254747.

It can be written as a sum of positive squares in 4 ways, for example, as 112896 + 74632321 = 336^2 + 8639^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74745217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74745817) 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, 1117 + ... + 12277.

It is an arithmetic number, because the mean of its divisors is an integer number (9649549).

Almost surely, 2^74745217 is an apocalyptic number.

74745217 is the 4992-nd hex number.

It is an amenable number.

74745217 is a deficient number, since it is larger than the sum of its proper divisors (2451175).

74745217 is a wasteful number, since it uses less digits than its factorization.

74745217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11379.

The product of its digits is 54880, while the sum is 37.

The square root of 74745217 is about 8645.5316204384. The cubic root of 74745217 is about 421.2382524233.

The spelling of 74745217 in words is "seventy-four million, seven hundred forty-five thousand, two hundred seventeen".