813345 has 32 divisors (see below), whose sum is σ = 1448832. Its totient is φ = 387072.

The previous prime is 813343. The next prime is 813361. The reversal of 813345 is 543318.

It is not a de Polignac number, because 813345 - 2¹ = 813343 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (813343) 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, 8337 + ... + 8433.

It is an arithmetic number, because the mean of its divisors is an integer number (45276).

2⁸¹³³⁴⁵ is an apocalyptic number.

It is an amenable number.

813345 is a deficient number, since it is larger than the sum of its proper divisors (635487).

813345 is a wasteful number, since it uses less digits than its factorization.

813345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161.

The product of its digits is 1440, while the sum is 24.

The square root of 813345 is about 901.8564187275. The cubic root of 813345 is about 93.3451161428.

The spelling of 813345 in words is "eight hundred thirteen thousand, three hundred forty-five".