25115009 has 2 divisors, whose sum is σ = 25115010. Its totient is φ = 25115008.

The previous prime is 25115003. The next prime is 25115023. The reversal of 25115009 is 90051152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15523600 + 9591409 = 3940^2 + 3097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25115009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25115003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12557504 + 12557505.

It is an arithmetic number, because the mean of its divisors is an integer number (12557505).

Almost surely, 2^25115009 is an apocalyptic number.

It is an amenable number.

25115009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25115009 is an equidigital number, since it uses as much as digits as its factorization.

25115009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 25115009 is about 5011.4877032674. The cubic root of 25115009 is about 292.8494724713.

The spelling of 25115009 in words is "twenty-five million, one hundred fifteen thousand, nine".