812144 has 20 divisors (see below), whose sum is σ = 1587696. Its totient is φ = 402432.

The previous prime is 812137. The next prime is 812167. The reversal of 812144 is 441218.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2957 + ... + 3219.

2⁸¹²¹⁴⁴ is an apocalyptic number.

It is an amenable number.

812144 is a deficient number, since it is larger than the sum of its proper divisors (775552).

812144 is a wasteful number, since it uses less digits than its factorization.

812144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 458 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 812144 is about 901.1903239605. The cubic root of 812144 is about 93.2991484785.

It can be divided in two parts, 81214 and 4, that added together give a palindrome (81218).

The spelling of 812144 in words is "eight hundred twelve thousand, one hundred forty-four".