26559121 has 2 divisors, whose sum is σ = 26559122. Its totient is φ = 26559120.

The previous prime is 26559119. The next prime is 26559139. The reversal of 26559121 is 12195562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26378496 + 180625 = 5136^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 26559121 - 2¹ = 26559119 is a prime.

Together with 26559119, it forms a pair of twin primes.

It is equal to p_1657309 and since 26559121 and 1657309 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 (26559161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13279560 + 13279561.

It is an arithmetic number, because the mean of its divisors is an integer number (13279561).

Almost surely, 2^26559121 is an apocalyptic number.

It is an amenable number.

26559121 is a deficient number, since it is larger than the sum of its proper divisors (1).

26559121 is an equidigital number, since it uses as much as digits as its factorization.

26559121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 26559121 is about 5153.5542104454. The cubic root of 26559121 is about 298.3581455874.

The spelling of 26559121 in words is "twenty-six million, five hundred fifty-nine thousand, one hundred twenty-one".