142243144 has 32 divisors (see below), whose sum is σ = 280051200. Its totient is φ = 67636800.

The previous prime is 142243141. The next prime is 142243151. The reversal of 142243144 is 441342241.

It is a super-2 number, since 2×142243144² = 40466224030009472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142243141) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10969 + ... + 20119.

It is an arithmetic number, because the mean of its divisors is an integer number (8751600).

Almost surely, 2^142243144 is an apocalyptic number.

It is an amenable number.

142243144 is a deficient number, since it is larger than the sum of its proper divisors (137808056).

142243144 is a wasteful number, since it uses less digits than its factorization.

142243144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9253 (or 9249 counting only the distinct ones).

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

The square root of 142243144 is about 11926.5730199416. The cubic root of 142243144 is about 522.0079465230.

Adding to 142243144 its reverse (441342241), we get a palindrome (583585385).

The spelling of 142243144 in words is "one hundred forty-two million, two hundred forty-three thousand, one hundred forty-four".