2831261 has 4 divisors (see below), whose sum is σ = 2922624. Its totient is φ = 2739900.

The previous prime is 2831237. The next prime is 2831263. The reversal of 2831261 is 1621382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2831261 - 2¹⁰ = 2830237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2831263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45635 + ... + 45696.

It is an arithmetic number, because the mean of its divisors is an integer number (730656).

2^2831261 is an apocalyptic number.

It is an amenable number.

2831261 is a deficient number, since it is larger than the sum of its proper divisors (91363).

2831261 is an equidigital number, since it uses as much as digits as its factorization.

2831261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91362.

The product of its digits is 576, while the sum is 23.

The square root of 2831261 is about 1682.6351357320. The cubic root of 2831261 is about 141.4685717262.

The spelling of 2831261 in words is "two million, eight hundred thirty-one thousand, two hundred sixty-one".