142776197 has 2 divisors, whose sum is σ = 142776198. Its totient is φ = 142776196.

The previous prime is 142776191. The next prime is 142776259. The reversal of 142776197 is 791677241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78872161 + 63904036 = 8881^2 + 7994^2 .

It is a cyclic number.

It is not a de Polignac number, because 142776197 - 2⁴ = 142776181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142776191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71388098 + 71388099.

It is an arithmetic number, because the mean of its divisors is an integer number (71388099).

Almost surely, 2^142776197 is an apocalyptic number.

It is an amenable number.

142776197 is a deficient number, since it is larger than the sum of its proper divisors (1).

142776197 is an equidigital number, since it uses as much as digits as its factorization.

142776197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 44.

The square root of 142776197 is about 11948.8994053846. The cubic root of 142776197 is about 522.6592047079.

The spelling of 142776197 in words is "one hundred forty-two million, seven hundred seventy-six thousand, one hundred ninety-seven".