26442221 has 4 divisors (see below), whose sum is σ = 28476252. Its totient is φ = 24408192.

The previous prime is 26442211. The next prime is 26442257. The reversal of 26442221 is 12224462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16924996 + 9517225 = 4114^2 + 3085^2 .

It is a cyclic number.

It is not a de Polignac number, because 26442221 - 2¹⁰ = 26441197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26442211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1016996 + ... + 1017021.

It is an arithmetic number, because the mean of its divisors is an integer number (7119063).

Almost surely, 2^26442221 is an apocalyptic number.

It is an amenable number.

26442221 is a deficient number, since it is larger than the sum of its proper divisors (2034031).

26442221 is a wasteful number, since it uses less digits than its factorization.

26442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034030.

The product of its digits is 1536, while the sum is 23.

The square root of 26442221 is about 5142.2000155575. The cubic root of 26442221 is about 297.9197605386.

Adding to 26442221 its reverse (12224462), we get a palindrome (38666683).

The spelling of 26442221 in words is "twenty-six million, four hundred forty-two thousand, two hundred twenty-one".