2563895 has 4 divisors (see below), whose sum is σ = 3076680. Its totient is φ = 2051112.

The previous prime is 2563877. The next prime is 2563901. The reversal of 2563895 is 5983652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2563895 - 2¹⁶ = 2498359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256385 + ... + 256394.

It is an arithmetic number, because the mean of its divisors is an integer number (769170).

2^2563895 is an apocalyptic number.

2563895 is a deficient number, since it is larger than the sum of its proper divisors (512785).

2563895 is an equidigital number, since it uses as much as digits as its factorization.

2563895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512784.

The product of its digits is 64800, while the sum is 38.

The square root of 2563895 is about 1601.2167248689. The cubic root of 2563895 is about 136.8674192892.

The spelling of 2563895 in words is "two million, five hundred sixty-three thousand, eight hundred ninety-five".