2500805 has 8 divisors (see below), whose sum is σ = 3057912. Its totient is φ = 1962688.

The previous prime is 2500783. The next prime is 2500807. The reversal of 2500805 is 5080052.

It can be written as a sum of positive squares in 4 ways, for example, as 515524 + 1985281 = 718^2 + 1409^2 .

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 2500805 - 2⁶ = 2500741 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 (2500807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4454 + ... + 4983.

It is an arithmetic number, because the mean of its divisors is an integer number (382239).

2^2500805 is an apocalyptic number.

It is an amenable number.

2500805 is a deficient number, since it is larger than the sum of its proper divisors (557107).

2500805 is an equidigital number, since it uses as much as digits as its factorization.

2500805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9495.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2500805 is about 1581.3933729468. The cubic root of 2500805 is about 135.7354466410.

Adding to 2500805 its reverse (5080052), we get a palindrome (7580857).

The spelling of 2500805 in words is "two million, five hundred thousand, eight hundred five".