142517 has 4 divisors (see below), whose sum is σ = 145260. Its totient is φ = 139776.

The previous prime is 142501. The next prime is 142529. The reversal of 142517 is 715241.

142517 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 an emirpimes, since its reverse is a distinct semiprime: 715241 = 17 ⋅42073.

It can be written as a sum of positive squares in 2 ways, for example, as 45796 + 96721 = 214^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 142517 - 2⁴ = 142501 is a prime.

It is a super-2 number, since 2×142517² = 40622190578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142517.

It is not an unprimeable number, because it can be changed into a prime (142537) 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, 1292 + ... + 1397.

It is an arithmetic number, because the mean of its divisors is an integer number (36315).

2¹⁴²⁵¹⁷ is an apocalyptic number.

It is an amenable number.

142517 is a deficient number, since it is larger than the sum of its proper divisors (2743).

142517 is an equidigital number, since it uses as much as digits as its factorization.

142517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742.

The product of its digits is 280, while the sum is 20.

The square root of 142517 is about 377.5142381421. The cubic root of 142517 is about 52.2342733283.

Adding to 142517 its reverse (715241), we get a palindrome (857758).

The spelling of 142517 in words is "one hundred forty-two thousand, five hundred seventeen".