2560805 has 8 divisors (see below), whose sum is σ = 3309432. Its totient is φ = 1891008.

The previous prime is 2560793. The next prime is 2560823. The reversal of 2560805 is 5080652.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 2411809 = 386^2 + 1553^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2560805 - 2⁶ = 2560741 is a prime.

It is a Duffinian 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, 19634 + ... + 19763.

It is an arithmetic number, because the mean of its divisors is an integer number (413679).

2^2560805 is an apocalyptic number.

It is an amenable number.

2560805 is a deficient number, since it is larger than the sum of its proper divisors (748627).

2560805 is a wasteful number, since it uses less digits than its factorization.

2560805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39415.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2560805 is about 1600.2515427270. The cubic root of 2560805 is about 136.8124130922.

The spelling of 2560805 in words is "two million, five hundred sixty thousand, eight hundred five".