2056643 has 8 divisors (see below), whose sum is σ = 2190240. Its totient is φ = 1924480.

The previous prime is 2056631. The next prime is 2056661. The reversal of 2056643 is 3466502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2056643 - 2⁴ = 2056627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2056603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5093 + ... + 5481.

It is an arithmetic number, because the mean of its divisors is an integer number (273780).

2^2056643 is an apocalyptic number.

2056643 is a deficient number, since it is larger than the sum of its proper divisors (133597).

2056643 is a wasteful number, since it uses less digits than its factorization.

2056643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2056643 is about 1434.1000662436. The cubic root of 2056643 is about 127.1704780650.

The spelling of 2056643 in words is "two million, fifty-six thousand, six hundred forty-three".