74172249 has 6 divisors (see below), whose sum is σ = 107137706. Its totient is φ = 49448160.

The previous prime is 74172247. The next prime is 74172269. The reversal of 74172249 is 94227147.

It can be written as a sum of positive squares in only one way, i.e., 49491225 + 24681024 = 7035^2 + 4968^2 .

It is not a de Polignac number, because 74172249 - 2¹ = 74172247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74172247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4120672 + ... + 4120689.

Almost surely, 2^74172249 is an apocalyptic number.

It is an amenable number.

74172249 is a deficient number, since it is larger than the sum of its proper divisors (32965457).

74172249 is a wasteful number, since it uses less digits than its factorization.

74172249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8241367 (or 8241364 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 74172249 is about 8612.3312175044. The cubic root of 74172249 is about 420.1591403735.

The spelling of 74172249 in words is "seventy-four million, one hundred seventy-two thousand, two hundred forty-nine".