8172745 has 16 divisors (see below), whose sum is σ = 11513088. Its totient is φ = 5451840.

The previous prime is 8172713. The next prime is 8172821. The reversal of 8172745 is 5472718.

It is a happy number.

8172745 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8172745 - 2⁵ = 8172713 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 8172745.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1861 + ... + 4450.

It is an arithmetic number, because the mean of its divisors is an integer number (719568).

Almost surely, 2^8172745 is an apocalyptic number.

It is an amenable number.

8172745 is a deficient number, since it is larger than the sum of its proper divisors (3340343).

8172745 is a wasteful number, since it uses less digits than its factorization.

8172745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6360.

The product of its digits is 15680, while the sum is 34.

The square root of 8172745 is about 2858.8013222328. The cubic root of 8172745 is about 201.4293028014.

The spelling of 8172745 in words is "eight million, one hundred seventy-two thousand, seven hundred forty-five".