1442221 has 4 divisors (see below), whose sum is σ = 1573344. Its totient is φ = 1311100.

The previous prime is 1442209. The next prime is 1442227. The reversal of 1442221 is 1222441.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1442221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1442195 and 1442204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442227) 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, 65545 + ... + 65566.

It is an arithmetic number, because the mean of its divisors is an integer number (393336).

2^1442221 is an apocalyptic number.

1442221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1442221 is a deficient number, since it is larger than the sum of its proper divisors (131123).

1442221 is a wasteful number, since it uses less digits than its factorization.

1442221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131122.

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

The square root of 1442221 is about 1200.9250601099. The cubic root of 1442221 is about 112.9823503381.

Adding to 1442221 its reverse (1222441), we get a palindrome (2664662).

The spelling of 1442221 in words is "one million, four hundred forty-two thousand, two hundred twenty-one".