631105 has 8 divisors (see below), whose sum is σ = 764712. Its totient is φ = 499968.

The previous prime is 631061. The next prime is 631121. The reversal of 631105 is 501136.

It can be written as a sum of positive squares in 4 ways, for example, as 51984 + 579121 = 228^2 + 761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631105 - 2⁹ = 630593 is a prime.

It is a Duffinian number.

631105 is a lucky number.

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 7 ways as a sum of consecutive naturals, for example, 7 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (95589).

2⁶³¹¹⁰⁵ is an apocalyptic number.

It is an amenable number.

631105 is a deficient number, since it is larger than the sum of its proper divisors (133607).

631105 is a wasteful number, since it uses less digits than its factorization.

631105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 631105 is about 794.4211729303. The cubic root of 631105 is about 85.7762798864.

The spelling of 631105 in words is "six hundred thirty-one thousand, one hundred five".