26005221 has 24 divisors (see below), whose sum is σ = 41150304. Its totient is φ = 15694560.

The previous prime is 26005211. The next prime is 26005237. The reversal of 26005221 is 12250062.

It is not a de Polignac number, because 26005221 - 2⁹ = 26004709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26005194 and 26005203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26005211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33975 + ... + 34731.

It is an arithmetic number, because the mean of its divisors is an integer number (1714596).

Almost surely, 2^26005221 is an apocalyptic number.

It is an amenable number.

26005221 is a deficient number, since it is larger than the sum of its proper divisors (15145083).

26005221 is a wasteful number, since it uses less digits than its factorization.

26005221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 26005221 is about 5099.5314490647. The cubic root of 26005221 is about 296.2694352469.

Adding to 26005221 its reverse (12250062), we get a palindrome (38255283).

The spelling of 26005221 in words is "twenty-six million, five thousand, two hundred twenty-one".