855172242 has 40 divisors (see below), whose sum is σ = 1982306700. Its totient is φ = 275226336.

The previous prime is 855172217. The next prime is 855172247. The reversal of 855172242 is 242271558.

It is a happy number.

855172242 is a `hidden beast` number, since 85 + 517 + 22 + 42 = 666.

855172242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 855036081 + 136161 = 29241^2 + 369^2 .

It is a junction number, because it is equal to n+sod(n) for n = 855172197 and 855172206.

It is not an unprimeable number, because it can be changed into a prime (855172247) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 86317 + ... + 95712.

Almost surely, 2^855172242 is an apocalyptic number.

855172242 is an abundant number, since it is smaller than the sum of its proper divisors (1127134458).

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

855172242 is a wasteful number, since it uses less digits than its factorization.

855172242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182072 (or 182063 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 855172242 is about 29243.3281621638. The cubic root of 855172242 is about 949.1857258982.

The spelling of 855172242 in words is "eight hundred fifty-five million, one hundred seventy-two thousand, two hundred forty-two".