74505243 has 4 divisors (see below), whose sum is σ = 99340328. Its totient is φ = 49670160.

The previous prime is 74505209. The next prime is 74505247. The reversal of 74505243 is 34250547.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 74505243 - 2⁸ = 74504987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74505243.

It is not an unprimeable number, because it can be changed into a prime (74505247) 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 3 ways as a sum of consecutive naturals, for example, 12417538 + ... + 12417543.

It is an arithmetic number, because the mean of its divisors is an integer number (24835082).

Almost surely, 2^74505243 is an apocalyptic number.

74505243 is a deficient number, since it is larger than the sum of its proper divisors (24835085).

74505243 is a wasteful number, since it uses less digits than its factorization.

74505243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24835084.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 74505243 is about 8631.6419643078. The cubic root of 74505243 is about 420.7869655631.

The spelling of 74505243 in words is "seventy-four million, five hundred five thousand, two hundred forty-three".