2563439 has 4 divisors (see below), whose sum is σ = 2575800. Its totient is φ = 2551080.

The previous prime is 2563433. The next prime is 2563441. The reversal of 2563439 is 9343652.

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 2563439 - 2¹⁶ = 2497903 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 (2563433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5864 + ... + 6285.

It is an arithmetic number, because the mean of its divisors is an integer number (643950).

2^2563439 is an apocalyptic number.

2563439 is a deficient number, since it is larger than the sum of its proper divisors (12361).

2563439 is a wasteful number, since it uses less digits than its factorization.

2563439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12360.

The product of its digits is 19440, while the sum is 32.

The square root of 2563439 is about 1601.0743268193. The cubic root of 2563439 is about 136.8593046507.

The spelling of 2563439 in words is "two million, five hundred sixty-three thousand, four hundred thirty-nine".