142224517 has 2 divisors, whose sum is σ = 142224518. Its totient is φ = 142224516.

The previous prime is 142224503. The next prime is 142224539. The reversal of 142224517 is 715422241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119049921 + 23174596 = 10911^2 + 4814^2 .

It is a cyclic number.

It is not a de Polignac number, because 142224517 - 2⁷ = 142224389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142224547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71112258 + 71112259.

It is an arithmetic number, because the mean of its divisors is an integer number (71112259).

Almost surely, 2^142224517 is an apocalyptic number.

It is an amenable number.

142224517 is a deficient number, since it is larger than the sum of its proper divisors (1).

142224517 is an equidigital number, since it uses as much as digits as its factorization.

142224517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 28.

The square root of 142224517 is about 11925.7920910940. The cubic root of 142224517 is about 521.9851595630.

Adding to 142224517 its reverse (715422241), we get a palindrome (857646758).

The spelling of 142224517 in words is "one hundred forty-two million, two hundred twenty-four thousand, five hundred seventeen".