74172245 has 16 divisors (see below), whose sum is σ = 101861760. Its totient is φ = 50791104.

The previous prime is 74172229. The next prime is 74172247. The reversal of 74172245 is 54227147.

It is not a de Polignac number, because 74172245 - 2⁴ = 74172229 is a prime.

It is a Curzon number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 49274 + ... + 50756.

It is an arithmetic number, because the mean of its divisors is an integer number (6366360).

Almost surely, 2^74172245 is an apocalyptic number.

It is an amenable number.

74172245 is a deficient number, since it is larger than the sum of its proper divisors (27689515).

74172245 is a wasteful number, since it uses less digits than its factorization.

74172245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924.

The product of its digits is 15680, while the sum is 32.

The square root of 74172245 is about 8612.3309852792. The cubic root of 74172245 is about 420.1591328206.

The spelling of 74172245 in words is "seventy-four million, one hundred seventy-two thousand, two hundred forty-five".