1812312 has 24 divisors (see below), whose sum is σ = 4908540. Its totient is φ = 604080.

The previous prime is 1812311. The next prime is 1812341. The reversal of 1812312 is 2132181.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12514 + ... + 12657.

2^1812312 is an apocalyptic number.

1812312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1812312 is an abundant number, since it is smaller than the sum of its proper divisors (3096228).

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

1812312 is a wasteful number, since it uses less digits than its factorization.

1812312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25183 (or 25176 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1812312 is about 1346.2213785258. The cubic root of 1812312 is about 121.9207583601.

Adding to 1812312 its reverse (2132181), we get a palindrome (3944493).

The spelling of 1812312 in words is "one million, eight hundred twelve thousand, three hundred twelve".