142330421 has 2 divisors, whose sum is σ = 142330422. Its totient is φ = 142330420.

The previous prime is 142330411. The next prime is 142330439. The reversal of 142330421 is 124033241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121308196 + 21022225 = 11014^2 + 4585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142330421 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142330393 and 142330402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142330411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71165210 + 71165211.

It is an arithmetic number, because the mean of its divisors is an integer number (71165211).

Almost surely, 2^142330421 is an apocalyptic number.

It is an amenable number.

142330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

142330421 is an equidigital number, since it uses as much as digits as its factorization.

142330421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 142330421 is about 11930.2313892062. The cubic root of 142330421 is about 522.1146885691.

Adding to 142330421 its reverse (124033241), we get a palindrome (266363662).

The spelling of 142330421 in words is "one hundred forty-two million, three hundred thirty thousand, four hundred twenty-one".