25261685 has 4 divisors (see below), whose sum is σ = 30314028. Its totient is φ = 20209344.

The previous prime is 25261681. The next prime is 25261693. The reversal of 25261685 is 58616252.

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 15570916 + 9690769 = 3946^2 + 3113^2 .

It is a cyclic number.

It is not a de Polignac number, because 25261685 - 2² = 25261681 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 (25261681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2526164 + ... + 2526173.

It is an arithmetic number, because the mean of its divisors is an integer number (7578507).

Almost surely, 2^25261685 is an apocalyptic number.

It is an amenable number.

25261685 is a deficient number, since it is larger than the sum of its proper divisors (5052343).

25261685 is an equidigital number, since it uses as much as digits as its factorization.

25261685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5052342.

The product of its digits is 28800, while the sum is 35.

The square root of 25261685 is about 5026.1003770319. The cubic root of 25261685 is about 293.4184634400.

The spelling of 25261685 in words is "twenty-five million, two hundred sixty-one thousand, six hundred eighty-five".