25540105 has 4 divisors (see below), whose sum is σ = 30648132. Its totient is φ = 20432080.

The previous prime is 25540079. The next prime is 25540111. The reversal of 25540105 is 50104552.

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 4782969 + 20757136 = 2187^2 + 4556^2 .

It is not a de Polignac number, because 25540105 - 2¹⁵ = 25507337 is a prime.

It is a super-2 number, since 2×25540105² = 1304593926822050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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, 2554006 + ... + 2554015.

It is an arithmetic number, because the mean of its divisors is an integer number (7662033).

Almost surely, 2^25540105 is an apocalyptic number.

It is an amenable number.

25540105 is a deficient number, since it is larger than the sum of its proper divisors (5108027).

25540105 is an equidigital number, since it uses as much as digits as its factorization.

25540105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108026.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 25540105 is about 5053.7218957913. The cubic root of 25540105 is about 294.4924913748.

Adding to 25540105 its reverse (50104552), we get a palindrome (75644657).

The spelling of 25540105 in words is "twenty-five million, five hundred forty thousand, one hundred five".