142857009 has 6 divisors (see below), whose sum is σ = 206349026. Its totient is φ = 95238000.

The previous prime is 142857007. The next prime is 142857031. The reversal of 142857009 is 900758241.

It can be written as a sum of positive squares in only one way, i.e., 123143409 + 19713600 = 11097^2 + 4440^2 .

It is not a de Polignac number, because 142857009 - 2¹ = 142857007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142857007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7936492 + ... + 7936509.

Almost surely, 2^142857009 is an apocalyptic number.

It is an amenable number.

142857009 is a deficient number, since it is larger than the sum of its proper divisors (63492017).

142857009 is a wasteful number, since it uses less digits than its factorization.

142857009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15873007 (or 15873004 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 142857009 is about 11952.2804936966. The cubic root of 142857009 is about 522.7577952999.

The spelling of 142857009 in words is "one hundred forty-two million, eight hundred fifty-seven thousand, nine".