8172005 has 16 divisors (see below), whose sum is σ = 10170624. Its totient is φ = 6298560.

The previous prime is 8171993. The next prime is 8172013. The reversal of 8172005 is 5002718.

It is not a de Polignac number, because 8172005 - 2¹² = 8167909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30020 + ... + 30290.

It is an arithmetic number, because the mean of its divisors is an integer number (635664).

Almost surely, 2^8172005 is an apocalyptic number.

It is an amenable number.

8172005 is a deficient number, since it is larger than the sum of its proper divisors (1998619).

8172005 is a wasteful number, since it uses less digits than its factorization.

8172005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 8172005 is about 2858.6718944293. The cubic root of 8172005 is about 201.4232231557.

The spelling of 8172005 in words is "eight million, one hundred seventy-two thousand, five".