1442342221 has 2 divisors, whose sum is σ = 1442342222. Its totient is φ = 1442342220.

The previous prime is 1442342197. The next prime is 1442342243. The reversal of 1442342221 is 1222432441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1363824900 + 78517321 = 36930^2 + 8861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1442342221 - 2⁵ = 1442342189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1442342281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721171110 + 721171111.

It is an arithmetic number, because the mean of its divisors is an integer number (721171111).

Almost surely, 2^1442342221 is an apocalyptic number.

It is an amenable number.

1442342221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442342221 is an equidigital number, since it uses as much as digits as its factorization.

1442342221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 25.

The square root of 1442342221 is about 37978.1808542747. The cubic root of 1442342221 is about 1129.8551569902.

Adding to 1442342221 its reverse (1222432441), we get a palindrome (2664774662).

It can be divided in two parts, 14423 and 42221, that added together give a square (56644 = 238²).

The spelling of 1442342221 in words is "one billion, four hundred forty-two million, three hundred forty-two thousand, two hundred twenty-one".