142135229 has 2 divisors, whose sum is σ = 142135230. Its totient is φ = 142135228.

The previous prime is 142135223. The next prime is 142135247. The reversal of 142135229 is 922531241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116683204 + 25452025 = 10802^2 + 5045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142135229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142135223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71067614 + 71067615.

It is an arithmetic number, because the mean of its divisors is an integer number (71067615).

Almost surely, 2^142135229 is an apocalyptic number.

It is an amenable number.

142135229 is a deficient number, since it is larger than the sum of its proper divisors (1).

142135229 is an equidigital number, since it uses as much as digits as its factorization.

142135229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 142135229 is about 11922.0480203697. The cubic root of 142135229 is about 521.8759032769.

The spelling of 142135229 in words is "one hundred forty-two million, one hundred thirty-five thousand, two hundred twenty-nine".