855261 has 24 divisors (see below), whose sum is σ = 1381536. Its totient is φ = 505440.

The previous prime is 855241. The next prime is 855269. The reversal of 855261 is 162558.

It is not a de Polignac number, because 855261 - 2⁵ = 855229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5166 + ... + 5328.

It is an arithmetic number, because the mean of its divisors is an integer number (57564).

2⁸⁵⁵²⁶¹ is an apocalyptic number.

It is an amenable number.

855261 is a deficient number, since it is larger than the sum of its proper divisors (526275).

855261 is a wasteful number, since it uses less digits than its factorization.

855261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 230 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 855261 is about 924.8032223127. The cubic root of 855261 is about 94.9218563303.

The spelling of 855261 in words is "eight hundred fifty-five thousand, two hundred sixty-one".