631425 has 12 divisors (see below), whose sum is σ = 1044080. Its totient is φ = 336720.

The previous prime is 631409. The next prime is 631429. The reversal of 631425 is 524136.

It is a happy number.

It is not a de Polignac number, because 631425 - 2⁴ = 631409 is a prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631425.

It is not an unprimeable number, because it can be changed into a prime (631429) 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 in 11 ways as a sum of consecutive naturals, for example, 4135 + ... + 4284.

2⁶³¹⁴²⁵ is an apocalyptic number.

It is an amenable number.

631425 is a deficient number, since it is larger than the sum of its proper divisors (412655).

631425 is a wasteful number, since it uses less digits than its factorization.

631425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8432 (or 8427 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 631425 is about 794.6225519075. The cubic root of 631425 is about 85.7907749766.

The spelling of 631425 in words is "six hundred thirty-one thousand, four hundred twenty-five".