815243 has 8 divisors (see below), whose sum is σ = 957936. Its totient is φ = 684000.

The previous prime is 815231. The next prime is 815251. The reversal of 815243 is 342518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 815243 - 2¹² = 811147 is a prime.

It is a super-2 number, since 2×815243² = 1329242298098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (815273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2708 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (119742).

2⁸¹⁵²⁴³ is an apocalyptic number.

815243 is a deficient number, since it is larger than the sum of its proper divisors (142693).

815243 is a wasteful number, since it uses less digits than its factorization.

815243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5725.

The product of its digits is 960, while the sum is 23.

The square root of 815243 is about 902.9080794854. The cubic root of 815243 is about 93.4176689531.

It can be divided in two parts, 8 and 15243, that added together give a palindrome (15251).

The spelling of 815243 in words is "eight hundred fifteen thousand, two hundred forty-three".