26642261 has 2 divisors, whose sum is σ = 26642262. Its totient is φ = 26642260.

The previous prime is 26642233. The next prime is 26642263. The reversal of 26642261 is 16224662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25654225 + 988036 = 5065^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 26642261 - 2¹⁴ = 26625877 is a prime.

Together with 26642263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26642263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13321130 + 13321131.

It is an arithmetic number, because the mean of its divisors is an integer number (13321131).

Almost surely, 2^26642261 is an apocalyptic number.

It is an amenable number.

26642261 is a deficient number, since it is larger than the sum of its proper divisors (1).

26642261 is an equidigital number, since it uses as much as digits as its factorization.

26642261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 26642261 is about 5161.6141855044. The cubic root of 26642261 is about 298.6691455592.

The spelling of 26642261 in words is "twenty-six million, six hundred forty-two thousand, two hundred sixty-one".