25645099 has 2 divisors, whose sum is σ = 25645100. Its totient is φ = 25645098.

The previous prime is 25645093. The next prime is 25645133. The reversal of 25645099 is 99054652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25645099 is a prime.

It is a super-2 number, since 2×25645099² = 1315342205439602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25645093) 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, 12822549 + 12822550.

It is an arithmetic number, because the mean of its divisors is an integer number (12822550).

Almost surely, 2^25645099 is an apocalyptic number.

25645099 is a deficient number, since it is larger than the sum of its proper divisors (1).

25645099 is an equidigital number, since it uses as much as digits as its factorization.

25645099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 25645099 is about 5064.0990314171. The cubic root of 25645099 is about 294.8954872522.

The spelling of 25645099 in words is "twenty-five million, six hundred forty-five thousand, ninety-nine".