26538257 has 2 divisors, whose sum is σ = 26538258. Its totient is φ = 26538256.

The previous prime is 26538227. The next prime is 26538271. The reversal of 26538257 is 75283562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24910081 + 1628176 = 4991^2 + 1276^2 .

It is a cyclic number.

It is not a de Polignac number, because 26538257 - 2¹⁸ = 26276113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26538257.

It is not a weakly prime, because it can be changed into another prime (26538227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13269128 + 13269129.

It is an arithmetic number, because the mean of its divisors is an integer number (13269129).

Almost surely, 2^26538257 is an apocalyptic number.

It is an amenable number.

26538257 is a deficient number, since it is larger than the sum of its proper divisors (1).

26538257 is an equidigital number, since it uses as much as digits as its factorization.

26538257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 38.

The square root of 26538257 is about 5151.5295786786. The cubic root of 26538257 is about 298.2799982333.

The spelling of 26538257 in words is "twenty-six million, five hundred thirty-eight thousand, two hundred fifty-seven".