221426 has 8 divisors (see below), whose sum is σ = 349680. Its totient is φ = 104868.

The previous prime is 221413. The next prime is 221447. The reversal of 221426 is 624122.

221426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2876 + ... + 2951.

It is an arithmetic number, because the mean of its divisors is an integer number (43710).

2²²¹⁴²⁶ is an apocalyptic number.

221426 is a deficient number, since it is larger than the sum of its proper divisors (128254).

221426 is a wasteful number, since it uses less digits than its factorization.

221426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5848.

The product of its digits is 192, while the sum is 17.

The square root of 221426 is about 470.5592417539. The cubic root of 221426 is about 60.4982582655.

Adding to 221426 its reverse (624122), we get a palindrome (845548).

The spelling of 221426 in words is "two hundred twenty-one thousand, four hundred twenty-six".