26105617 has 4 divisors (see below), whose sum is σ = 26116020. Its totient is φ = 26095216.

The previous prime is 26105593. The next prime is 26105623. The reversal of 26105617 is 71650162.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13424896 + 12680721 = 3664^2 + 3561^2 .

It is a cyclic number.

It is not a de Polignac number, because 26105617 - 2¹⁹ = 25581329 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (26105647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143 + ... + 7315.

It is an arithmetic number, because the mean of its divisors is an integer number (6529005).

Almost surely, 2^26105617 is an apocalyptic number.

It is an amenable number.

26105617 is a deficient number, since it is larger than the sum of its proper divisors (10403).

26105617 is an equidigital number, since it uses as much as digits as its factorization.

26105617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10402.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 26105617 is about 5109.3656161993. The cubic root of 26105617 is about 296.6502058507.

Adding to 26105617 its reverse (71650162), we get a palindrome (97755779).

The spelling of 26105617 in words is "twenty-six million, one hundred five thousand, six hundred seventeen".