25896781 has 8 divisors (see below), whose sum is σ = 27753984. Its totient is φ = 24100560.

The previous prime is 25896751. The next prime is 25896809. The reversal of 25896781 is 18769852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25896781 - 2¹¹ = 25894733 is a prime.

It is a super-2 number, since 2×25896781² = 1341286532323922, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25896721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14365 + ... + 16066.

It is an arithmetic number, because the mean of its divisors is an integer number (3469248).

Almost surely, 2^25896781 is an apocalyptic number.

It is an amenable number.

25896781 is a deficient number, since it is larger than the sum of its proper divisors (1857203).

25896781 is a wasteful number, since it uses less digits than its factorization.

25896781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30491.

The product of its digits is 241920, while the sum is 46.

The square root of 25896781 is about 5088.8879924793. The cubic root of 25896781 is about 295.8570537263.

The spelling of 25896781 in words is "twenty-five million, eight hundred ninety-six thousand, seven hundred eighty-one".