631825 has 12 divisors (see below), whose sum is σ = 793600. Its totient is φ = 498960.

The previous prime is 631819. The next prime is 631843. The reversal of 631825 is 528136.

It is a happy number.

It is not a de Polignac number, because 631825 - 2³ = 631817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 631825.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 3076 + ... + 3274.

2⁶³¹⁸²⁵ is an apocalyptic number.

It is an amenable number.

631825 is a deficient number, since it is larger than the sum of its proper divisors (161775).

631825 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 14 representation: 631825 = (126385)₁₄.

631825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 331 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 631825 is about 794.8742038839. The cubic root of 631825 is about 85.8088869541.

The spelling of 631825 in words is "six hundred thirty-one thousand, eight hundred twenty-five".