2057665 has 8 divisors (see below), whose sum is σ = 2482920. Its totient is φ = 1636992.

The previous prime is 2057659. The next prime is 2057669. The reversal of 2057665 is 5667502.

It can be written as a sum of positive squares in 4 ways, for example, as 1181569 + 876096 = 1087^2 + 936^2 .

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 2057665 - 2⁵ = 2057633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2057669) 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, 60 + ... + 2029.

It is an arithmetic number, because the mean of its divisors is an integer number (310365).

2^2057665 is an apocalyptic number.

It is an amenable number.

2057665 is a deficient number, since it is larger than the sum of its proper divisors (425255).

2057665 is a wasteful number, since it uses less digits than its factorization.

2057665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 2057665 is about 1434.4563430094. The cubic root of 2057665 is about 127.1915393618.

The spelling of 2057665 in words is "two million, fifty-seven thousand, six hundred sixty-five".