26601257 has 2 divisors, whose sum is σ = 26601258. Its totient is φ = 26601256.

The previous prime is 26601247. The next prime is 26601259. The reversal of 26601257 is 75210662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20529961 + 6071296 = 4531^2 + 2464^2 .

It is a cyclic number.

It is not a de Polignac number, because 26601257 - 2¹² = 26597161 is a prime.

Together with 26601259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26601259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13300628 + 13300629.

It is an arithmetic number, because the mean of its divisors is an integer number (13300629).

Almost surely, 2^26601257 is an apocalyptic number.

It is an amenable number.

26601257 is a deficient number, since it is larger than the sum of its proper divisors (1).

26601257 is an equidigital number, since it uses as much as digits as its factorization.

26601257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 26601257 is about 5157.6406427746. The cubic root of 26601257 is about 298.5158437832.

The spelling of 26601257 in words is "twenty-six million, six hundred one thousand, two hundred fifty-seven".