2570981 has 12 divisors (see below), whose sum is σ = 3036960. Its totient is φ = 2169720.

The previous prime is 2570969. The next prime is 2570989. The reversal of 2570981 is 1890752.

It is a de Polignac number, because none of the positive numbers 2^k-2570981 is a prime.

It is a super-2 number, since 2×2570981² = 13219886604722, which contains 22 as substring.

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 (2570989) 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 11 ways as a sum of consecutive naturals, for example, 3110 + ... + 3848.

It is an arithmetic number, because the mean of its divisors is an integer number (253080).

2^2570981 is an apocalyptic number.

It is an amenable number.

2570981 is a deficient number, since it is larger than the sum of its proper divisors (465979).

2570981 is an equidigital number, since it uses as much as digits as its factorization.

2570981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 2570981 is about 1603.4278904896. The cubic root of 2570981 is about 136.9933930428.

The spelling of 2570981 in words is "two million, five hundred seventy thousand, nine hundred eighty-one".