26787281 has 2 divisors, whose sum is σ = 26787282. Its totient is φ = 26787280.

The previous prime is 26787269. The next prime is 26787307. The reversal of 26787281 is 18278762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22886656 + 3900625 = 4784^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 26787281 - 2⁶ = 26787217 is a prime.

It is a super-2 number, since 2×26787281² = 1435116846745922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26787251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13393640 + 13393641.

It is an arithmetic number, because the mean of its divisors is an integer number (13393641).

Almost surely, 2^26787281 is an apocalyptic number.

It is an amenable number.

26787281 is a deficient number, since it is larger than the sum of its proper divisors (1).

26787281 is an equidigital number, since it uses as much as digits as its factorization.

26787281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 41.

The square root of 26787281 is about 5175.6430518342. The cubic root of 26787281 is about 299.2100737324.

The spelling of 26787281 in words is "twenty-six million, seven hundred eighty-seven thousand, two hundred eighty-one".