2056491 has 12 divisors (see below), whose sum is σ = 3007368. Its totient is φ = 1353984.

The previous prime is 2056489. The next prime is 2056501. The reversal of 2056491 is 1946502.

It is not a de Polignac number, because 2056491 - 2¹ = 2056489 is a prime.

2056491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2056421) 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, 630 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (250614).

2^2056491 is an apocalyptic number.

2056491 is a deficient number, since it is larger than the sum of its proper divisors (950877).

2056491 is a wasteful number, since it uses less digits than its factorization.

2056491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842 (or 2839 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2056491 is about 1434.0470703572. The cubic root of 2056491 is about 127.1673450648.

The spelling of 2056491 in words is "two million, fifty-six thousand, four hundred ninety-one".