142248217 has 2 divisors, whose sum is σ = 142248218. Its totient is φ = 142248216.

The previous prime is 142248209. The next prime is 142248241. The reversal of 142248217 is 712842241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119771136 + 22477081 = 10944^2 + 4741^2 .

It is a cyclic number.

It is not a de Polignac number, because 142248217 - 2³ = 142248209 is a prime.

It is not a weakly prime, because it can be changed into another prime (142248517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71124108 + 71124109.

It is an arithmetic number, because the mean of its divisors is an integer number (71124109).

Almost surely, 2^142248217 is an apocalyptic number.

It is an amenable number.

142248217 is a deficient number, since it is larger than the sum of its proper divisors (1).

142248217 is an equidigital number, since it uses as much as digits as its factorization.

142248217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7168, while the sum is 31.

The square root of 142248217 is about 11926.7856943939. The cubic root of 142248217 is about 522.0141521292.

The spelling of 142248217 in words is "one hundred forty-two million, two hundred forty-eight thousand, two hundred seventeen".