26013221 has 8 divisors (see below), whose sum is σ = 28053984. Its totient is φ = 23978160.

The previous prime is 26013217. The next prime is 26013227. The reversal of 26013221 is 12231062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26013221 - 2² = 26013217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26013227) 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 in 7 ways as a sum of consecutive naturals, for example, 16226 + ... + 17756.

It is an arithmetic number, because the mean of its divisors is an integer number (3506748).

Almost surely, 2^26013221 is an apocalyptic number.

It is an amenable number.

26013221 is a deficient number, since it is larger than the sum of its proper divisors (2040763).

26013221 is a wasteful number, since it uses less digits than its factorization.

26013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851.

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

The square root of 26013221 is about 5100.3157745379. The cubic root of 26013221 is about 296.2998126402.

Adding to 26013221 its reverse (12231062), we get a palindrome (38244283).

The spelling of 26013221 in words is "twenty-six million, thirteen thousand, two hundred twenty-one".