855513 has 12 divisors (see below), whose sum is σ = 1301040. Its totient is φ = 540216.

The previous prime is 855511. The next prime is 855521. The reversal of 855513 is 315558.

It is not a de Polignac number, because 855513 - 2¹ = 855511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855511) 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 11 ways as a sum of consecutive naturals, for example, 2331 + ... + 2672.

It is an arithmetic number, because the mean of its divisors is an integer number (108420).

2⁸⁵⁵⁵¹³ is an apocalyptic number.

It is an amenable number.

855513 is a deficient number, since it is larger than the sum of its proper divisors (445527).

855513 is a wasteful number, since it uses less digits than its factorization.

855513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028 (or 5025 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 855513 is about 924.9394574782. The cubic root of 855513 is about 94.9311782250.

The spelling of 855513 in words is "eight hundred fifty-five thousand, five hundred thirteen".