813015 has 48 divisors (see below), whose sum is σ = 1684800. Its totient is φ = 354816.

The previous prime is 813013. The next prime is 813017. The reversal of 813015 is 510318.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (813013) and next prime (813017).

It is not a de Polignac number, because 813015 - 2¹ = 813013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9091 + ... + 9179.

It is an arithmetic number, because the mean of its divisors is an integer number (35100).

2⁸¹³⁰¹⁵ is an apocalyptic number.

813015 is an abundant number, since it is smaller than the sum of its proper divisors (871785).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813015 is a wasteful number, since it uses less digits than its factorization.

813015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 133 counting only the distinct ones).

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

The square root of 813015 is about 901.6734442136. The cubic root of 813015 is about 93.3324900717.

The spelling of 813015 in words is "eight hundred thirteen thousand, fifteen".