26217641 has 2 divisors, whose sum is σ = 26217642. Its totient is φ = 26217640.

The previous prime is 26217637. The next prime is 26217643. The reversal of 26217641 is 14671262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22992025 + 3225616 = 4795^2 + 1796^2 .

It is a cyclic number.

It is not a de Polignac number, because 26217641 - 2² = 26217637 is a prime.

Together with 26217643, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1637255 and since 26217641 and 1637255 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (26217643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13108820 + 13108821.

It is an arithmetic number, because the mean of its divisors is an integer number (13108821).

Almost surely, 2^26217641 is an apocalyptic number.

It is an amenable number.

26217641 is a deficient number, since it is larger than the sum of its proper divisors (1).

26217641 is an equidigital number, since it uses as much as digits as its factorization.

26217641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 26217641 is about 5120.3164941242. The cubic root of 26217641 is about 297.0739271884.

The spelling of 26217641 in words is "twenty-six million, two hundred seventeen thousand, six hundred forty-one".