8172645 has 16 divisors (see below), whose sum is σ = 14082432. Its totient is φ = 4023360.

The previous prime is 8172611. The next prime is 8172673. The reversal of 8172645 is 5462718.

8172645 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 8172645 - 2⁷ = 8172517 is a prime.

It is a congruent number.

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, 20761 + ... + 21150.

It is an arithmetic number, because the mean of its divisors is an integer number (880152).

Almost surely, 2^8172645 is an apocalyptic number.

It is an amenable number.

8172645 is a deficient number, since it is larger than the sum of its proper divisors (5909787).

8172645 is a wasteful number, since it uses less digits than its factorization.

8172645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41932.

The product of its digits is 13440, while the sum is 33.

The square root of 8172645 is about 2858.7838323315. The cubic root of 8172645 is about 201.4284812491.

The spelling of 8172645 in words is "eight million, one hundred seventy-two thousand, six hundred forty-five".