631172 has 6 divisors (see below), whose sum is σ = 1104558. Its totient is φ = 315584.

The previous prime is 631171. The next prime is 631181. The reversal of 631172 is 271136.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 538756 + 92416 = 734^2 + 304^2 .

It is not an unprimeable number, because it can be changed into a prime (631171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78893 + ... + 78900.

It is an arithmetic number, because the mean of its divisors is an integer number (184093).

2⁶³¹¹⁷² is an apocalyptic number.

It is an amenable number.

631172 is a deficient number, since it is larger than the sum of its proper divisors (473386).

631172 is a wasteful number, since it uses less digits than its factorization.

631172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157797 (or 157795 counting only the distinct ones).

The product of its digits is 252, while the sum is 20.

The square root of 631172 is about 794.4633408786. The cubic root of 631172 is about 85.7793152014.

The spelling of 631172 in words is "six hundred thirty-one thousand, one hundred seventy-two".