812424 has 16 divisors (see below), whose sum is σ = 2031120. Its totient is φ = 270800.

The previous prime is 812401. The next prime is 812431. The reversal of 812424 is 424218.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 812424.

It is an unprimeable number.

812424 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 3 ways as a sum of consecutive naturals, for example, 16902 + ... + 16949.

It is an arithmetic number, because the mean of its divisors is an integer number (126945).

2⁸¹²⁴²⁴ is an apocalyptic number.

It is an amenable number.

812424 is an abundant number, since it is smaller than the sum of its proper divisors (1218696).

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

812424 is a wasteful number, since it uses less digits than its factorization.

812424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33860 (or 33856 counting only the distinct ones).

The product of its digits is 512, while the sum is 21.

The square root of 812424 is about 901.3456606652. The cubic root of 812424 is about 93.3098693851.

The spelling of 812424 in words is "eight hundred twelve thousand, four hundred twenty-four".