855761 has 8 divisors (see below), whose sum is σ = 924480. Its totient is φ = 789712.

The previous prime is 855739. The next prime is 855781. The reversal of 855761 is 167558.

855761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 855761 - 2⁶ = 855697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26 + ... + 1308.

It is an arithmetic number, because the mean of its divisors is an integer number (115560).

2⁸⁵⁵⁷⁶¹ is an apocalyptic number.

It is an amenable number.

855761 is a deficient number, since it is larger than the sum of its proper divisors (68719).

855761 is a wasteful number, since it uses less digits than its factorization.

855761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335.

The product of its digits is 8400, while the sum is 32.

The square root of 855761 is about 925.0735105925. The cubic root of 855761 is about 94.9403503660.

The spelling of 855761 in words is "eight hundred fifty-five thousand, seven hundred sixty-one".