812154 has 32 divisors (see below), whose sum is σ = 1892736. Its totient is φ = 227520.

The previous prime is 812137. The next prime is 812167. The reversal of 812154 is 451218.

812154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 812154.

It is a congruent number.

It is an unprimeable number.

812154 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 15 ways as a sum of consecutive naturals, for example, 2404 + ... + 2720.

It is an arithmetic number, because the mean of its divisors is an integer number (59148).

2⁸¹²¹⁵⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946368).

812154 is an abundant number, since it is smaller than the sum of its proper divisors (1080582).

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

812154 is a wasteful number, since it uses less digits than its factorization.

812154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390.

The product of its digits is 320, while the sum is 21.

The square root of 812154 is about 901.1958721610. The cubic root of 812154 is about 93.2995314105.

Adding to 812154 its sum of digits (21), we get a triangular number (812175 = T₁₂₇₄).

The spelling of 812154 in words is "eight hundred twelve thousand, one hundred fifty-four".