25781082 has 16 divisors (see below), whose sum is σ = 52956192. Its totient is φ = 8361360.

The previous prime is 25781069. The next prime is 25781083. The reversal of 25781082 is 28018752.

It is not an unprimeable number, because it can be changed into a prime (25781083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57844 + ... + 58287.

It is an arithmetic number, because the mean of its divisors is an integer number (3309762).

Almost surely, 2^25781082 is an apocalyptic number.

25781082 is an abundant number, since it is smaller than the sum of its proper divisors (27175110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25781082 is a wasteful number, since it uses less digits than its factorization.

25781082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116173.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 25781082 is about 5077.5074593741. The cubic root of 25781082 is about 295.4157959352.

Subtracting 25781082 from its reverse (28018752), we obtain a triangular number (2237670 = T₂₁₁₅).

The spelling of 25781082 in words is "twenty-five million, seven hundred eighty-one thousand, eighty-two".