74985247 has 4 divisors (see below), whose sum is σ = 75094456. Its totient is φ = 74876040.

The previous prime is 74985227. The next prime is 74985289. The reversal of 74985247 is 74258947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74258947 = 7 ⋅10608421.

It is a cyclic number.

It is not a de Polignac number, because 74985247 - 2¹¹ = 74983199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74985197 and 74985206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74985227) 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, 53568 + ... + 54949.

It is an arithmetic number, because the mean of its divisors is an integer number (18773614).

Almost surely, 2^74985247 is an apocalyptic number.

74985247 is a deficient number, since it is larger than the sum of its proper divisors (109209).

74985247 is a wasteful number, since it uses less digits than its factorization.

74985247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109208.

The product of its digits is 564480, while the sum is 46.

The square root of 74985247 is about 8659.4022311012. The cubic root of 74985247 is about 421.6886793662.

The spelling of 74985247 in words is "seventy-four million, nine hundred eighty-five thousand, two hundred forty-seven".