25040017 has 2 divisors, whose sum is σ = 25040018. Its totient is φ = 25040016.

The previous prime is 25039999. The next prime is 25040047. The reversal of 25040017 is 71004052.

It is a Cunningham number, because it is equal to 5004²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25040016 + 1 = 5004^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 25040017 - 2²³ = 16651409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25039976 and 25040003.

It is not a weakly prime, because it can be changed into another prime (25040047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12520008 + 12520009.

It is an arithmetic number, because the mean of its divisors is an integer number (12520009).

Almost surely, 2^25040017 is an apocalyptic number.

It is an amenable number.

25040017 is a deficient number, since it is larger than the sum of its proper divisors (1).

25040017 is an equidigital number, since it uses as much as digits as its factorization.

25040017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 25040017 is about 5004.0000999201. Note that the first 4 decimals coincide. The cubic root of 25040017 is about 292.5577045429.

Adding to 25040017 its reverse (71004052), we get a palindrome (96044069).

The spelling of 25040017 in words is "twenty-five million, forty thousand, seventeen".