142176817 has 2 divisors, whose sum is σ = 142176818. Its totient is φ = 142176816.

The previous prime is 142176809. The next prime is 142176841. The reversal of 142176817 is 718671241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141991056 + 185761 = 11916^2 + 431^2 .

It is a cyclic number.

It is not a de Polignac number, because 142176817 - 2³ = 142176809 is a prime.

It is not a weakly prime, because it can be changed into another prime (142176857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71088408 + 71088409.

It is an arithmetic number, because the mean of its divisors is an integer number (71088409).

Almost surely, 2^142176817 is an apocalyptic number.

It is an amenable number.

142176817 is a deficient number, since it is larger than the sum of its proper divisors (1).

142176817 is an equidigital number, since it uses as much as digits as its factorization.

142176817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 37.

The square root of 142176817 is about 11923.7920562210. The cubic root of 142176817 is about 521.9267976699.

The spelling of 142176817 in words is "one hundred forty-two million, one hundred seventy-six thousand, eight hundred seventeen".