2560651 has 2 divisors, whose sum is σ = 2560652. Its totient is φ = 2560650.

The previous prime is 2560639. The next prime is 2560661. The reversal of 2560651 is 1560652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2560651 - 2⁹ = 2560139 is a prime.

It is not a weakly prime, because it can be changed into another prime (2560601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280325 + 1280326.

It is an arithmetic number, because the mean of its divisors is an integer number (1280326).

2^2560651 is an apocalyptic number.

2560651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2560651 is an equidigital number, since it uses as much as digits as its factorization.

2560651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2560651 is about 1600.2034245683. The cubic root of 2560651 is about 136.8096705257.

Subtracting from 2560651 its reverse (1560652), we obtain a palindrome (999999).

The spelling of 2560651 in words is "two million, five hundred sixty thousand, six hundred fifty-one".