142003009 has 2 divisors, whose sum is σ = 142003010. Its totient is φ = 142003008.

The previous prime is 142002977. The next prime is 142003019. The reversal of 142003009 is 900300241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135652609 + 6350400 = 11647^2 + 2520^2 .

It is a cyclic number.

It is not a de Polignac number, because 142003009 - 2⁵ = 142002977 is a prime.

It is not a weakly prime, because it can be changed into another prime (142003019) 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, 71001504 + 71001505.

It is an arithmetic number, because the mean of its divisors is an integer number (71001505).

Almost surely, 2^142003009 is an apocalyptic number.

It is an amenable number.

142003009 is a deficient number, since it is larger than the sum of its proper divisors (1).

142003009 is an equidigital number, since it uses as much as digits as its factorization.

142003009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 142003009 is about 11916.5015419795. The cubic root of 142003009 is about 521.7140296401.

The spelling of 142003009 in words is "one hundred forty-two million, three thousand, nine".