855142122 has 8 divisors (see below), whose sum is σ = 1710284256. Its totient is φ = 285047372.

The previous prime is 855142117. The next prime is 855142129. The reversal of 855142122 is 221241558.

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

855142122 is an admirable number.

It is a super-3 number, since 3×855142122³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 855142122.

It is not an unprimeable number, because it can be changed into a prime (855142129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71261838 + ... + 71261849.

It is an arithmetic number, because the mean of its divisors is an integer number (213785532).

Almost surely, 2^855142122 is an apocalyptic number.

855142122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855142122 is a wasteful number, since it uses less digits than its factorization.

855142122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142523692.

The product of its digits is 6400, while the sum is 30.

The square root of 855142122 is about 29242.8131683667. The cubic root of 855142122 is about 949.1745820185.

The spelling of 855142122 in words is "eight hundred fifty-five million, one hundred forty-two thousand, one hundred twenty-two".