142217017 has 4 divisors (see below), whose sum is σ = 143546256. Its totient is φ = 140887780.

The previous prime is 142217003. The next prime is 142217021. The reversal of 142217017 is 710712241.

142217017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 710712241 = 541 ⋅1313701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142217017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142216982 and 142217000.

It is not an unprimeable number, because it can be changed into a prime (142217077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664459 + ... + 664672.

It is an arithmetic number, because the mean of its divisors is an integer number (35886564).

Almost surely, 2^142217017 is an apocalyptic number.

It is an amenable number.

142217017 is a deficient number, since it is larger than the sum of its proper divisors (1329239).

142217017 is a wasteful number, since it uses less digits than its factorization.

142217017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329238.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 142217017 is about 11925.4776424259. The cubic root of 142217017 is about 521.9759840294.

Adding to 142217017 its reverse (710712241), we get a palindrome (852929258).

The spelling of 142217017 in words is "one hundred forty-two million, two hundred seventeen thousand, seventeen".