25240109 has 2 divisors, whose sum is σ = 25240110. Its totient is φ = 25240108.

The previous prime is 25240099. The next prime is 25240139. The reversal of 25240109 is 90104252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 3988009 = 4610^2 + 1997^2 .

It is a cyclic number.

It is not a de Polignac number, because 25240109 - 2²⁰ = 24191533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25240139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12620054 + 12620055.

It is an arithmetic number, because the mean of its divisors is an integer number (12620055).

Almost surely, 2^25240109 is an apocalyptic number.

It is an amenable number.

25240109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25240109 is an equidigital number, since it uses as much as digits as its factorization.

25240109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 25240109 is about 5023.9535228742. The cubic root of 25240109 is about 293.3349034294.

The spelling of 25240109 in words is "twenty-five million, two hundred forty thousand, one hundred nine".