26486921 has 2 divisors, whose sum is σ = 26486922. Its totient is φ = 26486920.

The previous prime is 26486899. The next prime is 26486923. The reversal of 26486921 is 12968462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 6056521 = 4520^2 + 2461^2 .

It is a cyclic number.

It is not a de Polignac number, because 26486921 - 2¹⁴ = 26470537 is a prime.

Together with 26486923, 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 (26486923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13243460 + 13243461.

It is an arithmetic number, because the mean of its divisors is an integer number (13243461).

Almost surely, 2^26486921 is an apocalyptic number.

It is an amenable number.

26486921 is a deficient number, since it is larger than the sum of its proper divisors (1).

26486921 is an equidigital number, since it uses as much as digits as its factorization.

26486921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 26486921 is about 5146.5445689317. The cubic root of 26486921 is about 298.0875416577.

The spelling of 26486921 in words is "twenty-six million, four hundred eighty-six thousand, nine hundred twenty-one".