142856807 has 4 divisors (see below), whose sum is σ = 143030376. Its totient is φ = 142683240.

The previous prime is 142856803. The next prime is 142856851. The reversal of 142856807 is 708658241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 708658241 = 277 ⋅2558333.

It is a cyclic number.

It is not a de Polignac number, because 142856807 - 2² = 142856803 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 (142856803) 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, 85544 + ... + 87197.

It is an arithmetic number, because the mean of its divisors is an integer number (35757594).

Almost surely, 2^142856807 is an apocalyptic number.

142856807 is a deficient number, since it is larger than the sum of its proper divisors (173569).

142856807 is an equidigital number, since it uses as much as digits as its factorization.

142856807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173568.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 142856807 is about 11952.2720434234. The cubic root of 142856807 is about 522.7575489064.

The spelling of 142856807 in words is "one hundred forty-two million, eight hundred fifty-six thousand, eight hundred seven".