142179909 has 8 divisors (see below), whose sum is σ = 189863520. Its totient is φ = 94641456.

The previous prime is 142179893. The next prime is 142179931. The reversal of 142179909 is 909971241.

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

It is not a de Polignac number, because 142179909 - 2⁴ = 142179893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142179209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33982 + ... + 37935.

It is an arithmetic number, because the mean of its divisors is an integer number (23732940).

Almost surely, 2^142179909 is an apocalyptic number.

It is an amenable number.

142179909 is a deficient number, since it is larger than the sum of its proper divisors (47683611).

142179909 is an equidigital number, since it uses as much as digits as its factorization.

142179909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72579.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 142179909 is about 11923.9217122556. The cubic root of 142179909 is about 521.9305811887.

The spelling of 142179909 in words is "one hundred forty-two million, one hundred seventy-nine thousand, nine hundred nine".