142320420 has 72 divisors (see below), whose sum is σ = 470957760. Its totient is φ = 34501440.

The previous prime is 142320407. The next prime is 142320421. The reversal of 142320420 is 24023241.

142320420 is a `hidden beast` number, since 14 + 232 + 0 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 142320393 and 142320402.

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 in 23 ways as a sum of consecutive naturals, for example, 33960 + ... + 37919.

It is an arithmetic number, because the mean of its divisors is an integer number (6541080).

Almost surely, 2^142320420 is an apocalyptic number.

142320420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142320420 is an abundant number, since it is smaller than the sum of its proper divisors (328637340).

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

142320420 is a wasteful number, since it uses less digits than its factorization.

142320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71905 (or 71900 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 142320420 is about 11929.8122365777. The cubic root of 142320420 is about 522.1024592994.

Adding to 142320420 its reverse (24023241), we get a palindrome (166343661).

The spelling of 142320420 in words is "one hundred forty-two million, three hundred twenty thousand, four hundred twenty".