142330021 has 8 divisors (see below), whose sum is σ = 147538688. Its totient is φ = 137160000.

The previous prime is 142329989. The next prime is 142330061. The reversal of 142330021 is 120033241.

It is a happy number.

142330021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142330021 - 2⁵ = 142329989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142329977 and 142330004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142330061) 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, 2055 + ... + 16996.

It is an arithmetic number, because the mean of its divisors is an integer number (18442336).

Almost surely, 2^142330021 is an apocalyptic number.

It is an amenable number.

142330021 is a deficient number, since it is larger than the sum of its proper divisors (5208667).

142330021 is a wasteful number, since it uses less digits than its factorization.

142330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19323.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 142330021 is about 11930.2146250602. The cubic root of 142330021 is about 522.1141994582.

Adding to 142330021 its reverse (120033241), we get a palindrome (262363262).

The spelling of 142330021 in words is "one hundred forty-two million, three hundred thirty thousand, twenty-one".