26274581 has 2 divisors, whose sum is σ = 26274582. Its totient is φ = 26274580.

The previous prime is 26274541. The next prime is 26274583. The reversal of 26274581 is 18547262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23367556 + 2907025 = 4834^2 + 1705^2 .

It is a cyclic number.

It is not a de Polignac number, because 26274581 - 2⁶ = 26274517 is a prime.

It is a super-2 number, since 2×26274581² = 1380707213451122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 26274583, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26274583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13137290 + 13137291.

It is an arithmetic number, because the mean of its divisors is an integer number (13137291).

Almost surely, 2^26274581 is an apocalyptic number.

It is an amenable number.

26274581 is a deficient number, since it is larger than the sum of its proper divisors (1).

26274581 is an equidigital number, since it uses as much as digits as its factorization.

26274581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The square root of 26274581 is about 5125.8736816274. The cubic root of 26274581 is about 297.2888353926.

The spelling of 26274581 in words is "twenty-six million, two hundred seventy-four thousand, five hundred eighty-one".