142234321 has 2 divisors, whose sum is σ = 142234322. Its totient is φ = 142234320.

The previous prime is 142234303. The next prime is 142234373. The reversal of 142234321 is 123432241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111598096 + 30636225 = 10564^2 + 5535^2 .

It is a cyclic number.

It is not a de Polignac number, because 142234321 - 2¹³ = 142226129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142234292 and 142234301.

It is not a weakly prime, because it can be changed into another prime (142235321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71117160 + 71117161.

It is an arithmetic number, because the mean of its divisors is an integer number (71117161).

Almost surely, 2^142234321 is an apocalyptic number.

It is an amenable number.

142234321 is a deficient number, since it is larger than the sum of its proper divisors (1).

142234321 is an equidigital number, since it uses as much as digits as its factorization.

142234321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 22.

The square root of 142234321 is about 11926.2031258905. The cubic root of 142234321 is about 521.9971533342.

Adding to 142234321 its reverse (123432241), we get a palindrome (265666562).

The spelling of 142234321 in words is "one hundred forty-two million, two hundred thirty-four thousand, three hundred twenty-one".