855565442 has 4 divisors (see below), whose sum is σ = 1283348166. Its totient is φ = 427782720.

The previous prime is 855565439. The next prime is 855565463. The reversal of 855565442 is 244565558.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 850947241 + 4618201 = 29171^2 + 2149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 855565393 and 855565402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213891359 + ... + 213891362.

Almost surely, 2^855565442 is an apocalyptic number.

855565442 is a deficient number, since it is larger than the sum of its proper divisors (427782724).

855565442 is a wasteful number, since it uses less digits than its factorization.

855565442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427782723.

The product of its digits is 960000, while the sum is 44.

The square root of 855565442 is about 29250.0502905551. The cubic root of 855565442 is about 949.3311791074.

The spelling of 855565442 in words is "eight hundred fifty-five million, five hundred sixty-five thousand, four hundred forty-two".