25261117 has 18 divisors (see below), whose sum is σ = 30483258. Its totient is φ = 20871648.

The previous prime is 25261111. The next prime is 25261129. The reversal of 25261117 is 71116252.

It can be written as a sum of positive squares in 3 ways, for example, as 70756 + 25190361 = 266^2 + 5019^2 .

It is not a de Polignac number, because 25261117 - 2³ = 25261109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25261091 and 25261100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25261111) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 40903 + ... + 41515.

Almost surely, 2^25261117 is an apocalyptic number.

It is an amenable number.

25261117 is a deficient number, since it is larger than the sum of its proper divisors (5222141).

25261117 is an equidigital number, since it uses as much as digits as its factorization.

25261117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 649 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 25261117 is about 5026.0438716748. The cubic root of 25261117 is about 293.4162642869.

Adding to 25261117 its reverse (71116252), we get a palindrome (96377369).

The spelling of 25261117 in words is "twenty-five million, two hundred sixty-one thousand, one hundred seventeen".