25984881 has 20 divisors (see below), whose sum is σ = 41804532. Its totient is φ = 15990048.

The previous prime is 25984879. The next prime is 25984883. The reversal of 25984881 is 18848952.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25984879) and next prime (25984883).

It can be written as a sum of positive squares in 2 ways, for example, as 12960000 + 13024881 = 3600^2 + 3609^2 .

It is not a de Polignac number, because 25984881 - 2¹ = 25984879 is a prime.

It is a super-2 number, since 2×25984881² = 1350428081168322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25984883) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11286 + ... + 13391.

Almost surely, 2^25984881 is an apocalyptic number.

It is an amenable number.

25984881 is a deficient number, since it is larger than the sum of its proper divisors (15819651).

25984881 is a wasteful number, since it uses less digits than its factorization.

25984881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24702 (or 24693 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 25984881 is about 5097.5367580823. The cubic root of 25984881 is about 296.1921726578.

It can be divided in two parts, 25 and 984881, that added together give a triangular number (984906 = T₁₄₀₃).

The spelling of 25984881 in words is "twenty-five million, nine hundred eighty-four thousand, eight hundred eighty-one".