1812942 has 60 divisors (see below), whose sum is σ = 4425696. Its totient is φ = 554040.

The previous prime is 1812917. The next prime is 1812947. The reversal of 1812942 is 2492181.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 58467 + ... + 58497.

2^1812942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2212848).

1812942 is an abundant number, since it is smaller than the sum of its proper divisors (2612754).

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

1812942 is a wasteful number, since it uses less digits than its factorization.

1812942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 55 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1812942 is about 1346.4553464560. The cubic root of 1812942 is about 121.9348841801.

The spelling of 1812942 in words is "one million, eight hundred twelve thousand, nine hundred forty-two".