631485 has 12 divisors (see below), whose sum is σ = 1094652. Its totient is φ = 336768.

The previous prime is 631483. The next prime is 631487. The reversal of 631485 is 584136.

It is an interprime number because it is at equal distance from previous prime (631483) and next prime (631487).

It can be written as a sum of positive squares in 2 ways, for example, as 142884 + 488601 = 378^2 + 699^2 .

It is not a de Polignac number, because 631485 - 2¹ = 631483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6972 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (91221).

2⁶³¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

631485 is a deficient number, since it is larger than the sum of its proper divisors (463167).

631485 is a wasteful number, since it uses less digits than its factorization.

631485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14044 (or 14041 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 631485 is about 794.6603047844. The cubic root of 631485 is about 85.7934922607.

The spelling of 631485 in words is "six hundred thirty-one thousand, four hundred eighty-five".