26121659 has 2 divisors, whose sum is σ = 26121660. Its totient is φ = 26121658.

The previous prime is 26121631. The next prime is 26121661. The reversal of 26121659 is 95612162.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26121659 is a prime.

Together with 26121661, 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 (26121619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13060829 + 13060830.

It is an arithmetic number, because the mean of its divisors is an integer number (13060830).

Almost surely, 2^26121659 is an apocalyptic number.

26121659 is a deficient number, since it is larger than the sum of its proper divisors (1).

26121659 is an equidigital number, since it uses as much as digits as its factorization.

26121659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 26121659 is about 5110.9352373122. The cubic root of 26121659 is about 296.7109576314.

The spelling of 26121659 in words is "twenty-six million, one hundred twenty-one thousand, six hundred fifty-nine".