25986881 has 2 divisors, whose sum is σ = 25986882. Its totient is φ = 25986880.

The previous prime is 25986869. The next prime is 25986937. The reversal of 25986881 is 18868952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 5880625 = 4484^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 25986881 - 2²² = 21792577 is a prime.

It is a super-2 number, since 2×25986881² = 1350635968216322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25980881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12993440 + 12993441.

It is an arithmetic number, because the mean of its divisors is an integer number (12993441).

Almost surely, 2^25986881 is an apocalyptic number.

It is an amenable number.

25986881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25986881 is an equidigital number, since it uses as much as digits as its factorization.

25986881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 47.

The square root of 25986881 is about 5097.7329274885. The cubic root of 25986881 is about 296.1997715529.

The spelling of 25986881 in words is "twenty-five million, nine hundred eighty-six thousand, eight hundred eighty-one".