2556965 has 8 divisors (see below), whose sum is σ = 3143448. Its totient is φ = 1995520.

The previous prime is 2556943. The next prime is 2556977. The reversal of 2556965 is 5696552.

It can be written as a sum of positive squares in 4 ways, for example, as 51076 + 2505889 = 226^2 + 1583^2 .

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

It is not a de Polignac number, because 2556965 - 2¹⁴ = 2540581 is a prime.

It is a super-2 number, since 2×2556965² = 13076140022450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6032 + ... + 6441.

It is an arithmetic number, because the mean of its divisors is an integer number (392931).

2^2556965 is an apocalyptic number.

It is an amenable number.

2556965 is a deficient number, since it is larger than the sum of its proper divisors (586483).

2556965 is a wasteful number, since it uses less digits than its factorization.

2556965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12519.

The product of its digits is 81000, while the sum is 38.

The square root of 2556965 is about 1599.0512812290. The cubic root of 2556965 is about 136.7439941794.

The spelling of 2556965 in words is "two million, five hundred fifty-six thousand, nine hundred sixty-five".