142860191 has 2 divisors, whose sum is σ = 142860192. Its totient is φ = 142860190.

The previous prime is 142860187. The next prime is 142860217. The reversal of 142860191 is 191068241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142860191 - 2² = 142860187 is a prime.

It is a Chen prime.

It is equal to p_8064590 and since 142860191 and 8064590 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142860131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71430095 + 71430096.

It is an arithmetic number, because the mean of its divisors is an integer number (71430096).

Almost surely, 2^142860191 is an apocalyptic number.

142860191 is a deficient number, since it is larger than the sum of its proper divisors (1).

142860191 is an equidigital number, since it uses as much as digits as its factorization.

142860191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 142860191 is about 11952.4136056279. The cubic root of 142860191 is about 522.7616765771.

The spelling of 142860191 in words is "one hundred forty-two million, eight hundred sixty thousand, one hundred ninety-one".