142873309 has 8 divisors (see below), whose sum is σ = 149383872. Its totient is φ = 136387680.

The previous prime is 142873303. The next prime is 142873333. The reversal of 142873309 is 903378241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142873309 - 2³ = 142873301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142873301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6022 + ... + 17944.

It is an arithmetic number, because the mean of its divisors is an integer number (18672984).

Almost surely, 2^142873309 is an apocalyptic number.

It is an amenable number.

142873309 is a deficient number, since it is larger than the sum of its proper divisors (6510563).

142873309 is a wasteful number, since it uses less digits than its factorization.

142873309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12467.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 142873309 is about 11952.9623524882. The cubic root of 142873309 is about 522.7776767839. Note that the first 3 decimals are identical.

The spelling of 142873309 in words is "one hundred forty-two million, eight hundred seventy-three thousand, three hundred nine".