831265 has 12 divisors (see below), whose sum is σ = 1036692. Its totient is φ = 639840.

The previous prime is 831253. The next prime is 831287. The reversal of 831265 is 562138.

It is a happy number.

831265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 553536 + 277729 = 744^2 + 527^2 .

It is a de Polignac number, because none of the positive numbers 2^k-831265 is a prime.

It is a Duffinian number.

Its product of digits (1440) is a multiple of the sum of its prime factors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4719 + ... + 4891.

It is an arithmetic number, because the mean of its divisors is an integer number (86391).

831265 is a Friedman number, since it can be written as 865*31^2, using all its digits and the basic arithmetic operations.

2⁸³¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

831265 is a deficient number, since it is larger than the sum of its proper divisors (205427).

831265 is a wasteful number, since it uses less digits than its factorization.

831265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 209 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 831265 is about 911.7373525309. The cubic root of 831265 is about 94.0256833396.

It can be divided in two parts, 8312 and 65, that multiplied together give a triangular number (540280 = T₁₀₃₉).

The spelling of 831265 in words is "eight hundred thirty-one thousand, two hundred sixty-five".