25781283 has 12 divisors (see below), whose sum is σ = 40625208. Its totient is φ = 15624960.

The previous prime is 25781281. The next prime is 25781297. The reversal of 25781283 is 38218752.

25781283 is a `hidden beast` number, since 2 + 578 + 1 + 2 + 83 = 666.

It is not a de Polignac number, because 25781283 - 2¹ = 25781281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25781281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130110 + ... + 130307.

It is an arithmetic number, because the mean of its divisors is an integer number (3385434).

Almost surely, 2^25781283 is an apocalyptic number.

25781283 is a deficient number, since it is larger than the sum of its proper divisors (14843925).

25781283 is a wasteful number, since it uses less digits than its factorization.

25781283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260434 (or 260431 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 25781283 is about 5077.5272525118. The cubic root of 25781283 is about 295.4165636612.

The spelling of 25781283 in words is "twenty-five million, seven hundred eighty-one thousand, two hundred eighty-three".