142687847 has 4 divisors (see below), whose sum is σ = 142725720. Its totient is φ = 142649976.

The previous prime is 142687843. The next prime is 142687861. The reversal of 142687847 is 748786241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142687847 - 2² = 142687843 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142687841) 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 in 3 ways as a sum of consecutive naturals, for example, 12572 + ... + 21057.

It is an arithmetic number, because the mean of its divisors is an integer number (35681430).

Almost surely, 2^142687847 is an apocalyptic number.

142687847 is a deficient number, since it is larger than the sum of its proper divisors (37873).

142687847 is an equidigital number, since it uses as much as digits as its factorization.

142687847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37872.

The product of its digits is 602112, while the sum is 47.

The square root of 142687847 is about 11945.2018400695. The cubic root of 142687847 is about 522.5513751823.

The spelling of 142687847 in words is "one hundred forty-two million, six hundred eighty-seven thousand, eight hundred forty-seven".