1424221 has 4 divisors (see below), whose sum is σ = 1499200. Its totient is φ = 1349244.

The previous prime is 1424191. The next prime is 1424231. The reversal of 1424221 is 1224241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1224241 = 941 ⋅1301.

It is a cyclic number.

It is not a de Polignac number, because 1424221 - 2¹³ = 1416029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1424195 and 1424204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1424231) 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, 37461 + ... + 37498.

It is an arithmetic number, because the mean of its divisors is an integer number (374800).

2^1424221 is an apocalyptic number.

It is an amenable number.

1424221 is a deficient number, since it is larger than the sum of its proper divisors (74979).

1424221 is an equidigital number, since it uses as much as digits as its factorization.

1424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74978.

The product of its digits is 128, while the sum is 16.

The square root of 1424221 is about 1193.4073068320. The cubic root of 1424221 is about 112.5103463735.

Adding to 1424221 its reverse (1224241), we get a palindrome (2648462).

The spelling of 1424221 in words is "one million, four hundred twenty-four thousand, two hundred twenty-one".