26565601 has 2 divisors, whose sum is σ = 26565602. Its totient is φ = 26565600.

The previous prime is 26565599. The next prime is 26565613. The reversal of 26565601 is 10656562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13432225 + 13133376 = 3665^2 + 3624^2 .

It is a cyclic number.

It is not a de Polignac number, because 26565601 - 2¹ = 26565599 is a prime.

Together with 26565599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26565901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13282800 + 13282801.

It is an arithmetic number, because the mean of its divisors is an integer number (13282801).

Almost surely, 2^26565601 is an apocalyptic number.

It is an amenable number.

26565601 is a deficient number, since it is larger than the sum of its proper divisors (1).

26565601 is an equidigital number, since it uses as much as digits as its factorization.

26565601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 26565601 is about 5154.1828644316. The cubic root of 26565601 is about 298.3824084834.

The spelling of 26565601 in words is "twenty-six million, five hundred sixty-five thousand, six hundred one".