2551265 has 4 divisors (see below), whose sum is σ = 3061524. Its totient is φ = 2041008.

The previous prime is 2551249. The next prime is 2551273. The reversal of 2551265 is 5621552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1721344 + 829921 = 1312^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551265 - 2⁴ = 2551249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255122 + ... + 255131.

It is an arithmetic number, because the mean of its divisors is an integer number (765381).

2^2551265 is an apocalyptic number.

It is an amenable number.

2551265 is a deficient number, since it is larger than the sum of its proper divisors (510259).

2551265 is an equidigital number, since it uses as much as digits as its factorization.

2551265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510258.

The product of its digits is 3000, while the sum is 26.

The square root of 2551265 is about 1597.2679800209. The cubic root of 2551265 is about 136.6423084357.

The spelling of 2551265 in words is "two million, five hundred fifty-one thousand, two hundred sixty-five".