812130 has 64 divisors (see below), whose sum is σ = 2239488. Its totient is φ = 186560.

The previous prime is 812129. The next prime is 812137. The reversal of 812130 is 31218.

It is a happy number.

It is a super-4 number, since 4×812130⁴ (a number of 25 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (812137) 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, 7537 + ... + 7643.

It is an arithmetic number, because the mean of its divisors is an integer number (34992).

2⁸¹²¹³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119744).

812130 is an abundant number, since it is smaller than the sum of its proper divisors (1427358).

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

812130 is a wasteful number, since it uses less digits than its factorization.

812130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 812130 is about 901.1825564224. The cubic root of 812130 is about 93.2986123685.

Adding to 812130 its reverse (31218), we get a palindrome (843348).

It can be divided in two parts, 81 and 2130, that added together give a triangular number (2211 = T₆₆).

The spelling of 812130 in words is "eight hundred twelve thousand, one hundred thirty".