812138 has 8 divisors (see below), whose sum is σ = 1257600. Its totient is φ = 392940.

The previous prime is 812137. The next prime is 812167. The reversal of 812138 is 831218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 812138.

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 3 ways as a sum of consecutive naturals, for example, 6488 + ... + 6611.

It is an arithmetic number, because the mean of its divisors is an integer number (157200).

2⁸¹²¹³⁸ is an apocalyptic number.

812138 is a deficient number, since it is larger than the sum of its proper divisors (445462).

812138 is a wasteful number, since it uses less digits than its factorization.

812138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13132.

The product of its digits is 384, while the sum is 23.

The square root of 812138 is about 901.1869950238. The cubic root of 812138 is about 93.2989187178.

The spelling of 812138 in words is "eight hundred twelve thousand, one hundred thirty-eight".