813375 has 32 divisors (see below), whose sum is σ = 1510080. Its totient is φ = 432000.

The previous prime is 813367. The next prime is 813377. The reversal of 813375 is 573318.

It is not a de Polignac number, because 813375 - 2³ = 813367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3255 + ... + 3495.

It is an arithmetic number, because the mean of its divisors is an integer number (47190).

2⁸¹³³⁷⁵ is an apocalyptic number.

813375 is a deficient number, since it is larger than the sum of its proper divisors (696705).

813375 is a wasteful number, since it uses less digits than its factorization.

813375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 249 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 813375 is about 901.8730509334. The cubic root of 813375 is about 93.3462637981.

The spelling of 813375 in words is "eight hundred thirteen thousand, three hundred seventy-five".