142111444 has 24 divisors (see below), whose sum is σ = 255934728. Its totient is φ = 69014400.

The previous prime is 142111439. The next prime is 142111451. The reversal of 142111444 is 444111241.

It can be written as a sum of positive squares in 4 ways, for example, as 28944400 + 113167044 = 5380^2 + 10638^2 .

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

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 18094 + ... + 24730.

It is an arithmetic number, because the mean of its divisors is an integer number (10663947).

Almost surely, 2^142111444 is an apocalyptic number.

It is an amenable number.

142111444 is a deficient number, since it is larger than the sum of its proper divisors (113823284).

142111444 is a wasteful number, since it uses less digits than its factorization.

142111444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795 (or 6793 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

The square root of 142111444 is about 11921.0504570696. The cubic root of 142111444 is about 521.8467913040.

Adding to 142111444 its reverse (444111241), we get a palindrome (586222685).

The spelling of 142111444 in words is "one hundred forty-two million, one hundred eleven thousand, four hundred forty-four".