26261005 has 16 divisors (see below), whose sum is σ = 33487344. Its totient is φ = 19701760.

The previous prime is 26260987. The next prime is 26261041. The reversal of 26261005 is 50016262.

It can be written as a sum of positive squares in 8 ways, for example, as 15876 + 26245129 = 126^2 + 5123^2 .

It is not a de Polignac number, because 26261005 - 2⁵ = 26260973 is a prime.

It is a super-2 number, since 2×26261005² = 1379280767220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 43989 + ... + 44581.

It is an arithmetic number, because the mean of its divisors is an integer number (2092959).

Almost surely, 2^26261005 is an apocalyptic number.

It is an amenable number.

26261005 is a deficient number, since it is larger than the sum of its proper divisors (7226339).

26261005 is a wasteful number, since it uses less digits than its factorization.

26261005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 26261005 is about 5124.5492484705. The cubic root of 26261005 is about 297.2376238109.

Adding to 26261005 its reverse (50016262), we get a palindrome (76277267).

The spelling of 26261005 in words is "twenty-six million, two hundred sixty-one thousand, five".