142812287 has 4 divisors (see below), whose sum is σ = 143688600. Its totient is φ = 141935976.

The previous prime is 142812277. The next prime is 142812289. The reversal of 142812287 is 782218241.

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 142812287 - 2²⁴ = 126035071 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 (142812289) 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, 437912 + ... + 438237.

It is an arithmetic number, because the mean of its divisors is an integer number (35922150).

Almost surely, 2^142812287 is an apocalyptic number.

142812287 is a deficient number, since it is larger than the sum of its proper divisors (876313).

142812287 is an equidigital number, since it uses as much as digits as its factorization.

142812287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876312.

The product of its digits is 14336, while the sum is 35.

The square root of 142812287 is about 11950.4094908919. The cubic root of 142812287 is about 522.7032390824.

The spelling of 142812287 in words is "one hundred forty-two million, eight hundred twelve thousand, two hundred eighty-seven".