2557065 has 40 divisors (see below), whose sum is σ = 4840128. Its totient is φ = 1152480.

The previous prime is 2557063. The next prime is 2557067. The reversal of 2557065 is 5607552.

It is an interprime number because it is at equal distance from previous prime (2557063) and next prime (2557067).

It is not a de Polignac number, because 2557065 - 2¹ = 2557063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2557063) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35980 + ... + 36050.

2^2557065 is an apocalyptic number.

It is an amenable number.

2557065 is a deficient number, since it is larger than the sum of its proper divisors (2283063).

2557065 is an frugal number, since it uses more digits than its factorization.

2557065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 2557065 is about 1599.0825494639. The cubic root of 2557065 is about 136.7457767903.

The spelling of 2557065 in words is "two million, five hundred fifty-seven thousand, sixty-five".