1423221 has 8 divisors (see below), whose sum is σ = 1911840. Its totient is φ = 941712.

The previous prime is 1423193. The next prime is 1423231. The reversal of 1423221 is 1223241.

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

It is not a de Polignac number, because 1423221 - 2⁹ = 1422709 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1423221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1290 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (238980).

2^1423221 is an apocalyptic number.

It is an amenable number.

1423221 is a deficient number, since it is larger than the sum of its proper divisors (488619).

1423221 is a wasteful number, since it uses less digits than its factorization.

1423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555.

The product of its digits is 96, while the sum is 15.

The square root of 1423221 is about 1192.9882648207. The cubic root of 1423221 is about 112.4840076033.

Adding to 1423221 its reverse (1223241), we get a palindrome (2646462).

The spelling of 1423221 in words is "one million, four hundred twenty-three thousand, two hundred twenty-one".