142421329 has 2 divisors, whose sum is σ = 142421330. Its totient is φ = 142421328.

The previous prime is 142421311. The next prime is 142421351. The reversal of 142421329 is 923124241.

142421329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88736400 + 53684929 = 9420^2 + 7327^2 .

It is a cyclic number.

It is not a de Polignac number, because 142421329 - 2¹³ = 142413137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142421297 and 142421306.

It is not a weakly prime, because it can be changed into another prime (142421369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71210664 + 71210665.

It is an arithmetic number, because the mean of its divisors is an integer number (71210665).

Almost surely, 2^142421329 is an apocalyptic number.

It is an amenable number.

142421329 is a deficient number, since it is larger than the sum of its proper divisors (1).

142421329 is an equidigital number, since it uses as much as digits as its factorization.

142421329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 142421329 is about 11934.0407658094. The cubic root of 142421329 is about 522.2258250359.

The spelling of 142421329 in words is "one hundred forty-two million, four hundred twenty-one thousand, three hundred twenty-nine".