801855 has 24 divisors (see below), whose sum is σ = 1411488. Its totient is φ = 421056.

The previous prime is 801841. The next prime is 801859. The reversal of 801855 is 558108.

It is not a de Polignac number, because 801855 - 2⁶ = 801791 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4549 + ... + 4721.

It is an arithmetic number, because the mean of its divisors is an integer number (58812).

2⁸⁰¹⁸⁵⁵ is an apocalyptic number.

801855 is a deficient number, since it is larger than the sum of its proper divisors (609633).

801855 is a wasteful number, since it uses less digits than its factorization.

801855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 801855 is about 895.4635670981. The cubic root of 801855 is about 92.9034725133.

The spelling of 801855 in words is "eight hundred one thousand, eight hundred fifty-five".