442221142 has 16 divisors (see below), whose sum is σ = 724101264. Its totient is φ = 200880000.

The previous prime is 442221137. The next prime is 442221149. The reversal of 442221142 is 241122244.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442221149) 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, 34042 + ... + 45202.

It is an arithmetic number, because the mean of its divisors is an integer number (45256329).

Almost surely, 2^442221142 is an apocalyptic number.

442221142 is a deficient number, since it is larger than the sum of its proper divisors (281880122).

442221142 is a wasteful number, since it uses less digits than its factorization.

442221142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12975.

The product of its digits is 1024, while the sum is 22.

The square root of 442221142 is about 21029.0547100910. The cubic root of 442221142 is about 761.8681775627.

Adding to 442221142 its reverse (241122244), we get a palindrome (683343386).

The spelling of 442221142 in words is "four hundred forty-two million, two hundred twenty-one thousand, one hundred forty-two".