2560397 has 6 divisors (see below), whose sum is σ = 2978478. Its totient is φ = 2194584.

The previous prime is 2560379. The next prime is 2560399. The reversal of 2560397 is 7930652.

It can be written as a sum of positive squares in only one way, i.e., 1999396 + 561001 = 1414^2 + 749^2 .

It is not a de Polignac number, because 2560397 - 2²⁰ = 1511821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26078 + ... + 26175.

It is an arithmetic number, because the mean of its divisors is an integer number (496413).

2^2560397 is an apocalyptic number.

It is an amenable number.

2560397 is a deficient number, since it is larger than the sum of its proper divisors (418081).

2560397 is an equidigital number, since it uses as much as digits as its factorization.

2560397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52267 (or 52260 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 2560397 is about 1600.1240576905. The cubic root of 2560397 is about 136.8051468317.

The spelling of 2560397 in words is "two million, five hundred sixty thousand, three hundred ninety-seven".