25671881 has 2 divisors, whose sum is σ = 25671882. Its totient is φ = 25671880.

The previous prime is 25671857. The next prime is 25671889. The reversal of 25671881 is 18817652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25593481 + 78400 = 5059^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 25671881 - 2¹⁰ = 25670857 is a prime.

It is a super-2 number, since 2×25671881² = 1318090948156322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25671889) 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 as a sum of consecutive naturals, namely, 12835940 + 12835941.

It is an arithmetic number, because the mean of its divisors is an integer number (12835941).

Almost surely, 2^25671881 is an apocalyptic number.

It is an amenable number.

25671881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25671881 is an equidigital number, since it uses as much as digits as its factorization.

25671881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 38.

The square root of 25671881 is about 5066.7426419742. The cubic root of 25671881 is about 294.9981078113.

The spelling of 25671881 in words is "twenty-five million, six hundred seventy-one thousand, eight hundred eighty-one".