26825021 has 2 divisors, whose sum is σ = 26825022. Its totient is φ = 26825020.

The previous prime is 26824981. The next prime is 26825023. The reversal of 26825021 is 12052862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25351225 + 1473796 = 5035^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 26825021 - 2¹⁴ = 26808637 is a prime.

Together with 26825023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26825023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13412510 + 13412511.

It is an arithmetic number, because the mean of its divisors is an integer number (13412511).

Almost surely, 2^26825021 is an apocalyptic number.

It is an amenable number.

26825021 is a deficient number, since it is larger than the sum of its proper divisors (1).

26825021 is an equidigital number, since it uses as much as digits as its factorization.

26825021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 26825021 is about 5179.2876923376. The cubic root of 26825021 is about 299.3505245832.

Adding to 26825021 its reverse (12052862), we get a palindrome (38877883).

The spelling of 26825021 in words is "twenty-six million, eight hundred twenty-five thousand, twenty-one".