142643287 has 2 divisors, whose sum is σ = 142643288. Its totient is φ = 142643286.

The previous prime is 142643239. The next prime is 142643323. The reversal of 142643287 is 782346241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142643287 - 2⁷ = 142643159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142643227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71321643 + 71321644.

It is an arithmetic number, because the mean of its divisors is an integer number (71321644).

Almost surely, 2^142643287 is an apocalyptic number.

142643287 is a deficient number, since it is larger than the sum of its proper divisors (1).

142643287 is an equidigital number, since it uses as much as digits as its factorization.

142643287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The square root of 142643287 is about 11943.3365103726. The cubic root of 142643287 is about 522.4969736476.

The spelling of 142643287 in words is "one hundred forty-two million, six hundred forty-three thousand, two hundred eighty-seven".