25436881 has 2 divisors, whose sum is σ = 25436882. Its totient is φ = 25436880.

The previous prime is 25436869. The next prime is 25436891. The reversal of 25436881 is 18863452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23126481 + 2310400 = 4809^2 + 1520^2 .

It is a cyclic number.

It is not a de Polignac number, because 25436881 - 2⁵ = 25436849 is a prime.

It is a super-2 number, since 2×25436881² = 1294069830016322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25436881.

It is not a weakly prime, because it can be changed into another prime (25436891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12718440 + 12718441.

It is an arithmetic number, because the mean of its divisors is an integer number (12718441).

Almost surely, 2^25436881 is an apocalyptic number.

It is an amenable number.

25436881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25436881 is an equidigital number, since it uses as much as digits as its factorization.

25436881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 25436881 is about 5043.4988847030. The cubic root of 25436881 is about 294.0952111145.

The spelling of 25436881 in words is "twenty-five million, four hundred thirty-six thousand, eight hundred eighty-one".