142206287 has 2 divisors, whose sum is σ = 142206288. Its totient is φ = 142206286.

The previous prime is 142206221. The next prime is 142206299. The reversal of 142206287 is 782602241.

It is a strong prime.

It is an emirp because it is prime and its reverse (782602241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142206287 - 2¹⁰ = 142205263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142206787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71103143 + 71103144.

It is an arithmetic number, because the mean of its divisors is an integer number (71103144).

Almost surely, 2^142206287 is an apocalyptic number.

142206287 is a deficient number, since it is larger than the sum of its proper divisors (1).

142206287 is an equidigital number, since it uses as much as digits as its factorization.

142206287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 142206287 is about 11925.0277567811. The cubic root of 142206287 is about 521.9628563384.

The spelling of 142206287 in words is "one hundred forty-two million, two hundred six thousand, two hundred eighty-seven".