815013 has 12 divisors (see below), whose sum is σ = 1187628. Its totient is φ = 538560.

The previous prime is 814991. The next prime is 815029. The reversal of 815013 is 310518.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 567009 + 248004 = 753^2 + 498^2 .

It is not a de Polignac number, because 815013 - 2⁶ = 814949 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 903 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (98969).

2⁸¹⁵⁰¹³ is an apocalyptic number.

It is an amenable number.

815013 is a deficient number, since it is larger than the sum of its proper divisors (372615).

815013 is a wasteful number, since it uses less digits than its factorization.

815013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 815013 is about 902.7807042688. The cubic root of 815013 is about 93.4088829900.

The spelling of 815013 in words is "eight hundred fifteen thousand, thirteen".