142217613 has 10 divisors (see below), whose sum is σ = 212448654. Its totient is φ = 94811688.

The previous prime is 142217609. The next prime is 142217623. The reversal of 142217613 is 316712241.

142217613 is a `hidden beast` number, since 1 + 42 + 2 + 1 + 7 + 613 = 666.

It can be written as a sum of positive squares in only one way, i.e., 138368169 + 3849444 = 11763^2 + 1962^2 .

It is not a de Polignac number, because 142217613 - 2² = 142217609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142217623) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 877806 + ... + 877967.

Almost surely, 2^142217613 is an apocalyptic number.

It is an amenable number.

142217613 is a deficient number, since it is larger than the sum of its proper divisors (70231041).

142217613 is an equidigital number, since it uses as much as digits as its factorization.

142217613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755785 (or 1755776 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 142217613 is about 11925.5026309167. The cubic root of 142217613 is about 521.9767131903.

Adding to 142217613 its reverse (316712241), we get a palindrome (458929854).

The spelling of 142217613 in words is "one hundred forty-two million, two hundred seventeen thousand, six hundred thirteen".