25117507 has 2 divisors, whose sum is σ = 25117508. Its totient is φ = 25117506.

The previous prime is 25117493. The next prime is 25117513. The reversal of 25117507 is 70571152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25117507 - 2¹¹ = 25115459 is a prime.

It is not a weakly prime, because it can be changed into another prime (25117537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12558753 + 12558754.

It is an arithmetic number, because the mean of its divisors is an integer number (12558754).

Almost surely, 2^25117507 is an apocalyptic number.

25117507 is a deficient number, since it is larger than the sum of its proper divisors (1).

25117507 is an equidigital number, since it uses as much as digits as its factorization.

25117507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 25117507 is about 5011.7369244604. The cubic root of 25117507 is about 292.8591813235.

Adding to 25117507 its reverse (70571152), we get a palindrome (95688659).

The spelling of 25117507 in words is "twenty-five million, one hundred seventeen thousand, five hundred seven".