26285221 has 2 divisors, whose sum is σ = 26285222. Its totient is φ = 26285220.

The previous prime is 26285201. The next prime is 26285243. The reversal of 26285221 is 12258262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20930625 + 5354596 = 4575^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 26285221 - 2⁷ = 26285093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26285221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26285201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13142610 + 13142611.

It is an arithmetic number, because the mean of its divisors is an integer number (13142611).

Almost surely, 2^26285221 is an apocalyptic number.

It is an amenable number.

26285221 is a deficient number, since it is larger than the sum of its proper divisors (1).

26285221 is an equidigital number, since it uses as much as digits as its factorization.

26285221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 26285221 is about 5126.9114484258. The cubic root of 26285221 is about 297.3289594239.

The spelling of 26285221 in words is "twenty-six million, two hundred eighty-five thousand, two hundred twenty-one".