142342217 has 4 divisors (see below), whose sum is σ = 142585296. Its totient is φ = 142099140.

The previous prime is 142342171. The next prime is 142342253. The reversal of 142342217 is 712243241.

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.

It is a cyclic number.

It is not a de Polignac number, because 142342217 - 2¹² = 142338121 is a prime.

It is a super-2 number, since 2×142342217² = 40522613480950178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142362217) 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, 120659 + ... + 121832.

It is an arithmetic number, because the mean of its divisors is an integer number (35646324).

Almost surely, 2^142342217 is an apocalyptic number.

It is an amenable number.

142342217 is a deficient number, since it is larger than the sum of its proper divisors (243079).

142342217 is an equidigital number, since it uses as much as digits as its factorization.

142342217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243078.

The product of its digits is 2688, while the sum is 26.

The square root of 142342217 is about 11930.7257532809. The cubic root of 142342217 is about 522.1291120369.

Adding to 142342217 its reverse (712243241), we get a palindrome (854585458).

The spelling of 142342217 in words is "one hundred forty-two million, three hundred forty-two thousand, two hundred seventeen".