142320424 has 8 divisors (see below), whose sum is σ = 266850810. Its totient is φ = 71160208.

The previous prime is 142320421. The next prime is 142320443. The reversal of 142320424 is 424023241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 81324324 + 60996100 = 9018^2 + 7810^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 142320395 and 142320404.

It is not an unprimeable number, because it can be changed into a prime (142320421) 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 as a sum of consecutive naturals, namely, 8895019 + ... + 8895034.

Almost surely, 2^142320424 is an apocalyptic number.

It is an amenable number.

142320424 is a deficient number, since it is larger than the sum of its proper divisors (124530386).

142320424 is a wasteful number, since it uses less digits than its factorization.

142320424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17790059 (or 17790055 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 142320424 is about 11929.8124042250. The cubic root of 142320424 is about 522.1024641907.

Adding to 142320424 its reverse (424023241), we get a palindrome (566343665).

The spelling of 142320424 in words is "one hundred forty-two million, three hundred twenty thousand, four hundred twenty-four".