6815130 has 128 divisors (see below), whose sum is σ = 20901888. Its totient is φ = 1385472.

The previous prime is 6815117. The next prime is 6815131. The reversal of 6815130 is 315186.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6815130.

It is not an unprimeable number, because it can be changed into a prime (6815131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82069 + ... + 82151.

It is an arithmetic number, because the mean of its divisors is an integer number (163296).

Almost surely, 2^6815130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6815130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10450944).

6815130 is an abundant number, since it is smaller than the sum of its proper divisors (14086758).

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

6815130 is a wasteful number, since it uses less digits than its factorization.

6815130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 6815130 is about 2610.5803952378. The cubic root of 6815130 is about 189.5940548083.

The spelling of 6815130 in words is "six million, eight hundred fifteen thousand, one hundred thirty".