142320444 has 24 divisors (see below), whose sum is σ = 379521408. Its totient is φ = 40662960.

The previous prime is 142320443. The next prime is 142320457. The reversal of 142320444 is 444023241.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142320443) 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, 847062 + ... + 847229.

It is an arithmetic number, because the mean of its divisors is an integer number (15813392).

Almost surely, 2^142320444 is an apocalyptic number.

142320444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

142320444 is an abundant number, since it is smaller than the sum of its proper divisors (237200964).

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

142320444 is a wasteful number, since it uses less digits than its factorization.

142320444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694305 (or 1694303 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 142320444 is about 11929.8132424611. The cubic root of 142320444 is about 522.1024886474.

Adding to 142320444 its reverse (444023241), we get a palindrome (586343685).

The spelling of 142320444 in words is "one hundred forty-two million, three hundred twenty thousand, four hundred forty-four".