142881217 has 8 divisors (see below), whose sum is σ = 148058240. Its totient is φ = 137788560.

The previous prime is 142881191. The next prime is 142881247. The reversal of 142881217 is 712188241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142881217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142881247) 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, 17634 + ... + 24427.

It is an arithmetic number, because the mean of its divisors is an integer number (18507280).

Almost surely, 2^142881217 is an apocalyptic number.

It is an amenable number.

142881217 is a deficient number, since it is larger than the sum of its proper divisors (5177023).

142881217 is an equidigital number, since it uses as much as digits as its factorization.

142881217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42183.

The product of its digits is 7168, while the sum is 34.

The square root of 142881217 is about 11953.2931445690. The cubic root of 142881217 is about 522.7873218082.

The spelling of 142881217 in words is "one hundred forty-two million, eight hundred eighty-one thousand, two hundred seventeen".