8427172 has 24 divisors (see below), whose sum is σ = 16817976. Its totient is φ = 3660288.

The previous prime is 8427163. The next prime is 8427173. The reversal of 8427172 is 2717248.

It can be written as a sum of positive squares in 4 ways, for example, as 224676 + 8202496 = 474^2 + 2864^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8427173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3883 + ... + 5650.

It is an arithmetic number, because the mean of its divisors is an integer number (700749).

Almost surely, 2^8427172 is an apocalyptic number.

It is an amenable number.

8427172 is a deficient number, since it is larger than the sum of its proper divisors (8390804).

8427172 is a wasteful number, since it uses less digits than its factorization.

8427172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9567 (or 9565 counting only the distinct ones).

The product of its digits is 6272, while the sum is 31.

The square root of 8427172 is about 2902.9591798715. The cubic root of 8427172 is about 203.4982221289.

The spelling of 8427172 in words is "eight million, four hundred twenty-seven thousand, one hundred seventy-two".