1811942 has 8 divisors (see below), whose sum is σ = 2965032. Its totient is φ = 823600.

The previous prime is 1811939. The next prime is 1811959. The reversal of 1811942 is 2491181.

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

It is a super-2 number, since 2×1811942² = 6566267622728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 41159 + ... + 41202.

It is an arithmetic number, because the mean of its divisors is an integer number (370629).

2^1811942 is an apocalyptic number.

1811942 is a deficient number, since it is larger than the sum of its proper divisors (1153090).

1811942 is a wasteful number, since it uses less digits than its factorization.

1811942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82374.

The product of its digits is 576, while the sum is 26.

The square root of 1811942 is about 1346.0839498337. The cubic root of 1811942 is about 121.9124607177.

The spelling of 1811942 in words is "one million, eight hundred eleven thousand, nine hundred forty-two".