8172012 has 12 divisors (see below), whose sum is σ = 19068056. Its totient is φ = 2724000.

The previous prime is 8171993. The next prime is 8172013. The reversal of 8172012 is 2102718.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 8172012.

It is not an unprimeable number, because it can be changed into a prime (8172013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340489 + ... + 340512.

Almost surely, 2^8172012 is an apocalyptic number.

It is an amenable number.

8172012 is an abundant number, since it is smaller than the sum of its proper divisors (10896044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8172012 is a wasteful number, since it uses less digits than its factorization.

8172012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681008 (or 681006 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 8172012 is about 2858.6731187738. The cubic root of 8172012 is about 201.4232806675.

The spelling of 8172012 in words is "eight million, one hundred seventy-two thousand, twelve".