25390117 has 4 divisors (see below), whose sum is σ = 25453836. Its totient is φ = 25326400.

The previous prime is 25390093. The next prime is 25390121. The reversal of 25390117 is 71109352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14638276 + 10751841 = 3826^2 + 3279^2 .

It is a cyclic number.

It is not a de Polignac number, because 25390117 - 2⁷ = 25389989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25390217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31258 + ... + 32059.

It is an arithmetic number, because the mean of its divisors is an integer number (6363459).

Almost surely, 2^25390117 is an apocalyptic number.

It is an amenable number.

25390117 is a deficient number, since it is larger than the sum of its proper divisors (63719).

25390117 is an equidigital number, since it uses as much as digits as its factorization.

25390117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63718.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 25390117 is about 5038.8606847183. The cubic root of 25390117 is about 293.9148757830.

Adding to 25390117 its reverse (71109352), we get a palindrome (96499469).

The spelling of 25390117 in words is "twenty-five million, three hundred ninety thousand, one hundred seventeen".