855455 has 4 divisors (see below), whose sum is σ = 1026552. Its totient is φ = 684360.

The previous prime is 855431. The next prime is 855461. The reversal of 855455 is 554558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554558 = 2 ⋅277279.

It is not a de Polignac number, because 855455 - 2⁶ = 855391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85541 + ... + 85550.

It is an arithmetic number, because the mean of its divisors is an integer number (256638).

2⁸⁵⁵⁴⁵⁵ is an apocalyptic number.

855455 is a deficient number, since it is larger than the sum of its proper divisors (171097).

855455 is a wasteful number, since it uses less digits than its factorization.

855455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171096.

The product of its digits is 20000, while the sum is 32.

The square root of 855455 is about 924.9081035433. The cubic root of 855455 is about 94.9290328717.

The spelling of 855455 in words is "eight hundred fifty-five thousand, four hundred fifty-five".