2563885 has 8 divisors (see below), whose sum is σ = 3107736. Its totient is φ = 2030400.

The previous prime is 2563877. The next prime is 2563901. The reversal of 2563885 is 5883652.

It can be written as a sum of positive squares in 4 ways, for example, as 1630729 + 933156 = 1277^2 + 966^2 .

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

It is not a de Polignac number, because 2563885 - 2³ = 2563877 is a prime.

It is a d-powerful number, because it can be written as 2⁸ + 5⁶ + 6⁵ + 3⁹ + 8⁵ + 8⁷ + 5⁸ .

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 2034 + ... + 3043.

It is an arithmetic number, because the mean of its divisors is an integer number (388467).

2^2563885 is an apocalyptic number.

It is an amenable number.

2563885 is a deficient number, since it is larger than the sum of its proper divisors (543851).

2563885 is a wasteful number, since it uses less digits than its factorization.

2563885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183.

The product of its digits is 57600, while the sum is 37.

The square root of 2563885 is about 1601.2136022405. The cubic root of 2563885 is about 136.8672413469.

The spelling of 2563885 in words is "two million, five hundred sixty-three thousand, eight hundred eighty-five".