2831257 has 12 divisors (see below), whose sum is σ = 3346704. Its totient is φ = 2374320.

The previous prime is 2831237. The next prime is 2831263. The reversal of 2831257 is 7521382.

It is a de Polignac number, because none of the positive numbers 2^k-2831257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2831237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1098 + ... + 2620.

It is an arithmetic number, because the mean of its divisors is an integer number (278892).

2^2831257 is an apocalyptic number.

It is an amenable number.

2831257 is a deficient number, since it is larger than the sum of its proper divisors (515447).

2831257 is a wasteful number, since it uses less digits than its factorization.

2831257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560 (or 1547 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 2831257 is about 1682.6339471198. The cubic root of 2831257 is about 141.4685051040.

It can be divided in two parts, 283 and 1257, that added together give a triangular number (1540 = T₅₅).

The spelling of 2831257 in words is "two million, eight hundred thirty-one thousand, two hundred fifty-seven".