25561263 has 32 divisors (see below), whose sum is σ = 42380800. Its totient is φ = 13343616.

The previous prime is 25561253. The next prime is 25561297. The reversal of 25561263 is 36216552.

It is not a de Polignac number, because 25561263 - 2⁴ = 25561247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25561263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25561223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29328 + ... + 30186.

It is an arithmetic number, because the mean of its divisors is an integer number (1324400).

Almost surely, 2^25561263 is an apocalyptic number.

25561263 is a deficient number, since it is larger than the sum of its proper divisors (16819537).

25561263 is a wasteful number, since it uses less digits than its factorization.

25561263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its digits is 10800, while the sum is 30.

The square root of 25561263 is about 5055.8147711323. The cubic root of 25561263 is about 294.5737903401.

The spelling of 25561263 in words is "twenty-five million, five hundred sixty-one thousand, two hundred sixty-three".