142334209 has 2 divisors, whose sum is σ = 142334210. Its totient is φ = 142334208.

The previous prime is 142334201. The next prime is 142334249. The reversal of 142334209 is 902433241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77933584 + 64400625 = 8828^2 + 8025^2 .

It is an emirp because it is prime and its reverse (902433241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142334209 - 2³ = 142334201 is a prime.

It is not a weakly prime, because it can be changed into another prime (142334201) 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, 71167104 + 71167105.

It is an arithmetic number, because the mean of its divisors is an integer number (71167105).

Almost surely, 2^142334209 is an apocalyptic number.

It is an amenable number.

142334209 is a deficient number, since it is larger than the sum of its proper divisors (1).

142334209 is an equidigital number, since it uses as much as digits as its factorization.

142334209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 142334209 is about 11930.3901445007. The cubic root of 142334209 is about 522.1193204036.

The spelling of 142334209 in words is "one hundred forty-two million, three hundred thirty-four thousand, two hundred nine".