142609889 has 16 divisors (see below), whose sum is σ = 156473856. Its totient is φ = 129388800.

The previous prime is 142609811. The next prime is 142609897. The reversal of 142609889 is 988906241.

It is a cyclic number.

It is not a de Polignac number, because 142609889 - 2⁸ = 142609633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142609289) 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, 242654 + ... + 243240.

It is an arithmetic number, because the mean of its divisors is an integer number (9779616).

Almost surely, 2^142609889 is an apocalyptic number.

It is an amenable number.

142609889 is a deficient number, since it is larger than the sum of its proper divisors (13863967).

142609889 is a wasteful number, since it uses less digits than its factorization.

142609889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 142609889 is about 11941.9382430157. The cubic root of 142609889 is about 522.4561919270.

The spelling of 142609889 in words is "one hundred forty-two million, six hundred nine thousand, eight hundred eighty-nine".