812490 has 64 divisors (see below), whose sum is σ = 2301696. Its totient is φ = 179712.

The previous prime is 812477. The next prime is 812491. The reversal of 812490 is 94218.

812490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 812490.

It is not an unprimeable number, because it can be changed into a prime (812491) by changing a digit.

812490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11094 + ... + 11166.

It is an arithmetic number, because the mean of its divisors is an integer number (35964).

2⁸¹²⁴⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1150848).

812490 is an abundant number, since it is smaller than the sum of its proper divisors (1489206).

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

812490 is a wasteful number, since it uses less digits than its factorization.

812490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 812490 is about 901.3822718470. The cubic root of 812490 is about 93.3123960972.

The spelling of 812490 in words is "eight hundred twelve thousand, four hundred ninety".