855442 has 32 divisors (see below), whose sum is σ = 1584000. Its totient is φ = 345744.

The previous prime is 855431. The next prime is 855461. The reversal of 855442 is 244558.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 855442.

It is a congruent number.

It is an unprimeable number.

855442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19873 + ... + 19915.

It is an arithmetic number, because the mean of its divisors is an integer number (49500).

2⁸⁵⁵⁴⁴² is an apocalyptic number.

855442 is a deficient number, since it is larger than the sum of its proper divisors (728558).

855442 is a wasteful number, since it uses less digits than its factorization.

855442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 81 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 855442 is about 924.9010757914. The cubic root of 855442 is about 94.9285520034.

The spelling of 855442 in words is "eight hundred fifty-five thousand, four hundred forty-two".