142304009 has 2 divisors, whose sum is σ = 142304010. Its totient is φ = 142304008.

The previous prime is 142303963. The next prime is 142304021. The reversal of 142304009 is 900403241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138415225 + 3888784 = 11765^2 + 1972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142304009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142304039) 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, 71152004 + 71152005.

It is an arithmetic number, because the mean of its divisors is an integer number (71152005).

Almost surely, 2^142304009 is an apocalyptic number.

It is an amenable number.

142304009 is a deficient number, since it is larger than the sum of its proper divisors (1).

142304009 is an equidigital number, since it uses as much as digits as its factorization.

142304009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 142304009 is about 11929.1244020674. The cubic root of 142304009 is about 522.0823906102.

The spelling of 142304009 in words is "one hundred forty-two million, three hundred four thousand, nine".