8172746 has 4 divisors (see below), whose sum is σ = 12259122. Its totient is φ = 4086372.

The previous prime is 8172713. The next prime is 8172821. The reversal of 8172746 is 6472718.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5736025 + 2436721 = 2395^2 + 1561^2 .

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 as a sum of consecutive naturals, namely, 2043185 + ... + 2043188.

Almost surely, 2^8172746 is an apocalyptic number.

8172746 is a deficient number, since it is larger than the sum of its proper divisors (4086376).

8172746 is a wasteful number, since it uses less digits than its factorization.

8172746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086375.

The product of its digits is 18816, while the sum is 35.

The square root of 8172746 is about 2858.8014971313. The cubic root of 8172746 is about 201.4293110169.

It can be divided in two parts, 81 and 72746, that added together give a palindrome (72827).

The spelling of 8172746 in words is "eight million, one hundred seventy-two thousand, seven hundred forty-six".