856542142 has 8 divisors (see below), whose sum is σ = 1302413616. Its totient is φ = 422404272.

The previous prime is 856542139. The next prime is 856542157. The reversal of 856542142 is 241245658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2933218 + ... + 2933509.

It is an arithmetic number, because the mean of its divisors is an integer number (162801702).

Almost surely, 2^856542142 is an apocalyptic number.

856542142 is a deficient number, since it is larger than the sum of its proper divisors (445871474).

856542142 is a wasteful number, since it uses less digits than its factorization.

856542142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5866802.

The product of its digits is 76800, while the sum is 37.

The square root of 856542142 is about 29266.7412261769. The cubic root of 856542142 is about 949.6922888915.

The spelling of 856542142 in words is "eight hundred fifty-six million, five hundred forty-two thousand, one hundred forty-two".