26491601 has 2 divisors, whose sum is σ = 26491602. Its totient is φ = 26491600.

The previous prime is 26491589. The next prime is 26491603. The reversal of 26491601 is 10619462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23425600 + 3066001 = 4840^2 + 1751^2 .

It is a cyclic number.

It is not a de Polignac number, because 26491601 - 2⁶ = 26491537 is a prime.

Together with 26491603, 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 (26491603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13245800 + 13245801.

It is an arithmetic number, because the mean of its divisors is an integer number (13245801).

Almost surely, 2^26491601 is an apocalyptic number.

It is an amenable number.

26491601 is a deficient number, since it is larger than the sum of its proper divisors (1).

26491601 is an equidigital number, since it uses as much as digits as its factorization.

26491601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 26491601 is about 5146.9992228482. Note that the first 3 decimals coincide. The cubic root of 26491601 is about 298.1050970837.

The spelling of 26491601 in words is "twenty-six million, four hundred ninety-one thousand, six hundred one".