26117281 has 2 divisors, whose sum is σ = 26117282. Its totient is φ = 26117280.

The previous prime is 26117263. The next prime is 26117293. The reversal of 26117281 is 18271162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25411681 + 705600 = 5041^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 26117281 - 2⁵ = 26117249 is a prime.

It is a super-2 number, since 2×26117281² = 1364224733665922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26117251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13058640 + 13058641.

It is an arithmetic number, because the mean of its divisors is an integer number (13058641).

Almost surely, 2^26117281 is an apocalyptic number.

It is an amenable number.

26117281 is a deficient number, since it is larger than the sum of its proper divisors (1).

26117281 is an equidigital number, since it uses as much as digits as its factorization.

26117281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 28.

The square root of 26117281 is about 5110.5069220186. The cubic root of 26117281 is about 296.6943804154.

The spelling of 26117281 in words is "twenty-six million, one hundred seventeen thousand, two hundred eighty-one".