2565155 has 4 divisors (see below), whose sum is σ = 3078192. Its totient is φ = 2052120.

The previous prime is 2565151. The next prime is 2565161. The reversal of 2565155 is 5515652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2565155 - 2² = 2565151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256511 + ... + 256520.

It is an arithmetic number, because the mean of its divisors is an integer number (769548).

2^2565155 is an apocalyptic number.

2565155 is a deficient number, since it is larger than the sum of its proper divisors (513037).

2565155 is an equidigital number, since it uses as much as digits as its factorization.

2565155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513036.

The product of its digits is 7500, while the sum is 29.

The square root of 2565155 is about 1601.6101273406. The cubic root of 2565155 is about 136.8898363157.

The spelling of 2565155 in words is "two million, five hundred sixty-five thousand, one hundred fifty-five".