142120444 has 12 divisors (see below), whose sum is σ = 249016600. Its totient is φ = 70972848.

The previous prime is 142120421. The next prime is 142120457. The reversal of 142120444 is 444021241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18114 + ... + 24745.

Almost surely, 2^142120444 is an apocalyptic number.

It is an amenable number.

142120444 is a deficient number, since it is larger than the sum of its proper divisors (106896156).

142120444 is a wasteful number, since it uses less digits than its factorization.

142120444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43692 (or 43690 counting only the distinct ones).

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

The square root of 142120444 is about 11921.4279346058. The cubic root of 142120444 is about 521.8578073579.

Adding to 142120444 its reverse (444021241), we get a palindrome (586141685).

The spelling of 142120444 in words is "one hundred forty-two million, one hundred twenty thousand, four hundred forty-four".