142320123 has 12 divisors (see below), whose sum is σ = 224262168. Its totient is φ = 86254560.

The previous prime is 142320097. The next prime is 142320149. The reversal of 142320123 is 321023241.

It is an interprime number because it is at equal distance from previous prime (142320097) and next prime (142320149).

It is not a de Polignac number, because 142320123 - 2¹⁶ = 142254587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142320096 and 142320105.

It is not an unprimeable number, because it can be changed into a prime (142320173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 718690 + ... + 718887.

It is an arithmetic number, because the mean of its divisors is an integer number (18688514).

Almost surely, 2^142320123 is an apocalyptic number.

142320123 is a deficient number, since it is larger than the sum of its proper divisors (81942045).

142320123 is a wasteful number, since it uses less digits than its factorization.

142320123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437594 (or 1437591 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 142320123 is about 11929.7997887643. The cubic root of 142320123 is about 522.1020961176.

Adding to 142320123 its reverse (321023241), we get a palindrome (463343364).

The spelling of 142320123 in words is "one hundred forty-two million, three hundred twenty thousand, one hundred twenty-three".