631486 has 4 divisors (see below), whose sum is σ = 947232. Its totient is φ = 315742.

The previous prime is 631483. The next prime is 631487. The reversal of 631486 is 684136.

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

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 as a sum of consecutive naturals, namely, 157870 + ... + 157873.

It is an arithmetic number, because the mean of its divisors is an integer number (236808).

2⁶³¹⁴⁸⁶ is an apocalyptic number.

631486 is a deficient number, since it is larger than the sum of its proper divisors (315746).

631486 is a wasteful number, since it uses less digits than its factorization.

631486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315745.

The product of its digits is 3456, while the sum is 28.

The square root of 631486 is about 794.6609339838. The cubic root of 631486 is about 85.7935375474.

Subtracting 631486 from its reverse (684136), we obtain a triangular number (52650 = T₃₂₄).

It can be divided in two parts, 6314 and 86, that added together give a square (6400 = 80²).

The spelling of 631486 in words is "six hundred thirty-one thousand, four hundred eighty-six".