26301221 has 2 divisors, whose sum is σ = 26301222. Its totient is φ = 26301220.

The previous prime is 26301217. The next prime is 26301229. The reversal of 26301221 is 12210362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26152996 + 148225 = 5114^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 26301221 - 2² = 26301217 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26301221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26301229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13150610 + 13150611.

It is an arithmetic number, because the mean of its divisors is an integer number (13150611).

Almost surely, 2^26301221 is an apocalyptic number.

It is an amenable number.

26301221 is a deficient number, since it is larger than the sum of its proper divisors (1).

26301221 is an equidigital number, since it uses as much as digits as its factorization.

26301221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 26301221 is about 5128.4716046791. The cubic root of 26301221 is about 297.3892759343.

Adding to 26301221 its reverse (12210362), we get a palindrome (38511583).

The spelling of 26301221 in words is "twenty-six million, three hundred one thousand, two hundred twenty-one".