25390207 has 2 divisors, whose sum is σ = 25390208. Its totient is φ = 25390206.

The previous prime is 25390201. The next prime is 25390217. The reversal of 25390207 is 70209352.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25390207 is a prime.

It is a super-2 number, since 2×25390207² = 1289325223005698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25390201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12695103 + 12695104.

It is an arithmetic number, because the mean of its divisors is an integer number (12695104).

Almost surely, 2^25390207 is an apocalyptic number.

25390207 is a deficient number, since it is larger than the sum of its proper divisors (1).

25390207 is an equidigital number, since it uses as much as digits as its factorization.

25390207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 25390207 is about 5038.8696153006. The cubic root of 25390207 is about 293.9152230612.

Adding to 25390207 its reverse (70209352), we get a palindrome (95599559).

The spelling of 25390207 in words is "twenty-five million, three hundred ninety thousand, two hundred seven".