142871009 has 16 divisors (see below), whose sum is σ = 159522048. Its totient is φ = 127260672.

The previous prime is 142870997. The next prime is 142871021. The reversal of 142871009 is 900178241.

It is an interprime number because it is at equal distance from previous prime (142870997) and next prime (142871021).

It is a cyclic number.

It is not a de Polignac number, because 142871009 - 2⁴ = 142870993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142871059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36044 + ... + 39810.

It is an arithmetic number, because the mean of its divisors is an integer number (9970128).

Almost surely, 2^142871009 is an apocalyptic number.

It is an amenable number.

142871009 is a deficient number, since it is larger than the sum of its proper divisors (16651039).

142871009 is a wasteful number, since it uses less digits than its factorization.

142871009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 142871009 is about 11952.8661416415. The cubic root of 142871009 is about 522.7748715128.

The spelling of 142871009 in words is "one hundred forty-two million, eight hundred seventy-one thousand, nine".