631085 has 32 divisors (see below), whose sum is σ = 994560. Its totient is φ = 373248.

The previous prime is 631061. The next prime is 631121. The reversal of 631085 is 580136.

It is a cyclic number.

It is not a de Polignac number, because 631085 - 2¹⁴ = 614701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8609 + ... + 8681.

It is an arithmetic number, because the mean of its divisors is an integer number (31080).

2⁶³¹⁰⁸⁵ is an apocalyptic number.

631085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

631085 is a deficient number, since it is larger than the sum of its proper divisors (363475).

631085 is a wasteful number, since it uses less digits than its factorization.

631085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 631085 is about 794.4085850493. The cubic root of 631085 is about 85.7753737806.

The spelling of 631085 in words is "six hundred thirty-one thousand, eighty-five".