25849871 has 2 divisors, whose sum is σ = 25849872. Its totient is φ = 25849870.

The previous prime is 25849853. The next prime is 25849897. The reversal of 25849871 is 17894852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25849871 - 2²² = 21655567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25849801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12924935 + 12924936.

It is an arithmetic number, because the mean of its divisors is an integer number (12924936).

Almost surely, 2^25849871 is an apocalyptic number.

25849871 is a deficient number, since it is larger than the sum of its proper divisors (1).

25849871 is an equidigital number, since it uses as much as digits as its factorization.

25849871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 44.

The square root of 25849871 is about 5084.2768414004. The cubic root of 25849871 is about 295.6783050900.

The spelling of 25849871 in words is "twenty-five million, eight hundred forty-nine thousand, eight hundred seventy-one".