142242444 has 18 divisors (see below), whose sum is σ = 359557380. Its totient is φ = 47414136.

The previous prime is 142242433. The next prime is 142242461. The reversal of 142242444 is 444242241.

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1975554 + ... + 1975625.

It is an arithmetic number, because the mean of its divisors is an integer number (19975410).

Almost surely, 2^142242444 is an apocalyptic number.

It is an amenable number.

142242444 is an abundant number, since it is smaller than the sum of its proper divisors (217314936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142242444 is a wasteful number, since it uses less digits than its factorization.

142242444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951189 (or 3951184 counting only the distinct ones).

The product of its digits is 8192, while the sum is 27.

The square root of 142242444 is about 11926.5436736718. The cubic root of 142242444 is about 522.0070902283.

Adding to 142242444 its reverse (444242241), we get a palindrome (586484685).

The spelling of 142242444 in words is "one hundred forty-two million, two hundred forty-two thousand, four hundred forty-four".