142640323 has 8 divisors (see below), whose sum is σ = 166344800. Its totient is φ = 122262840.

The previous prime is 142640287. The next prime is 142640327. The reversal of 142640323 is 323046241.

It is not a de Polignac number, because 142640323 - 2⁹ = 142639811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142640327) 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, 207588 + ... + 208273.

It is an arithmetic number, because the mean of its divisors is an integer number (20793100).

Almost surely, 2^142640323 is an apocalyptic number.

142640323 is a deficient number, since it is larger than the sum of its proper divisors (23704477).

142640323 is an frugal number, since it uses more digits than its factorization.

142640323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415882 (or 415868 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 142640323 is about 11943.2124237996. The cubic root of 142640323 is about 522.4933546158.

Adding to 142640323 its reverse (323046241), we get a palindrome (465686564).

The spelling of 142640323 in words is "one hundred forty-two million, six hundred forty thousand, three hundred twenty-three".