25307081 has 2 divisors, whose sum is σ = 25307082. Its totient is φ = 25307080.

The previous prime is 25307071. The next prime is 25307083. The reversal of 25307081 is 18070352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21939856 + 3367225 = 4684^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 25307081 - 2⁶ = 25307017 is a prime.

It is a super-2 number, since 2×25307081² = 1280896697481122, which contains 22 as substring.

Together with 25307083, it forms a pair of twin primes.

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 25307081.

It is not a weakly prime, because it can be changed into another prime (25307083) 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, 12653540 + 12653541.

It is an arithmetic number, because the mean of its divisors is an integer number (12653541).

Almost surely, 2^25307081 is an apocalyptic number.

It is an amenable number.

25307081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25307081 is an equidigital number, since it uses as much as digits as its factorization.

25307081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 25307081 is about 5030.6143759982. The cubic root of 25307081 is about 293.5941188340.

The spelling of 25307081 in words is "twenty-five million, three hundred seven thousand, eighty-one".