813875 has 16 divisors (see below), whose sum is σ = 1078272. Its totient is φ = 611200.

The previous prime is 813871. The next prime is 813893. The reversal of 813875 is 578318.

It is not a de Polignac number, because 813875 - 2² = 813871 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (813871) 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 15 ways as a sum of consecutive naturals, for example, 1934 + ... + 2316.

It is an arithmetic number, because the mean of its divisors is an integer number (67392).

2⁸¹³⁸⁷⁵ is an apocalyptic number.

813875 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

813875 is a deficient number, since it is larger than the sum of its proper divisors (264397).

813875 is a wasteful number, since it uses less digits than its factorization.

813875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 405 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 813875 is about 902.1502092224. The cubic root of 813875 is about 93.3653872330.

The spelling of 813875 in words is "eight hundred thirteen thousand, eight hundred seventy-five".