142000509 has 16 divisors (see below), whose sum is σ = 227770880. Its totient is φ = 76872240.

The previous prime is 142000483. The next prime is 142000511. The reversal of 142000509 is 905000241.

It is not a de Polignac number, because 142000509 - 2¹⁶ = 141934973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142000519) 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, 177547 + ... + 178344.

It is an arithmetic number, because the mean of its divisors is an integer number (14235680).

Almost surely, 2^142000509 is an apocalyptic number.

142000509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

142000509 is a deficient number, since it is larger than the sum of its proper divisors (85770371).

142000509 is a wasteful number, since it uses less digits than its factorization.

142000509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355920.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 142000509 is about 11916.3966449594. The cubic root of 142000509 is about 521.7109679850.

The spelling of 142000509 in words is "one hundred forty-two million, five hundred nine", and thus it is an aban number.