226421 has 4 divisors (see below), whose sum is σ = 243852. Its totient is φ = 208992.

The previous prime is 226409. The next prime is 226427. The reversal of 226421 is 124622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124622 = 2 ⋅62311.

It can be written as a sum of positive squares in 2 ways, for example, as 130321 + 96100 = 361^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 226421 - 2⁶ = 226357 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 226421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226427) 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 in 3 ways as a sum of consecutive naturals, for example, 8696 + ... + 8721.

It is an arithmetic number, because the mean of its divisors is an integer number (60963).

2²²⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

226421 is a deficient number, since it is larger than the sum of its proper divisors (17431).

226421 is a wasteful number, since it uses less digits than its factorization.

226421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17430.

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

The square root of 226421 is about 475.8371570191. The cubic root of 226421 is about 60.9497929616.

The spelling of 226421 in words is "two hundred twenty-six thousand, four hundred twenty-one".