811942 has 8 divisors (see below), whose sum is σ = 1260000. Its totient is φ = 391944.

The previous prime is 811933. The next prime is 811957. The reversal of 811942 is 249118.

It is a happy number.

811942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×811942² = 1318499622728, which contains 22 as substring.

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, 6942 + ... + 7057.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2⁸¹¹⁹⁴² is an apocalyptic number.

811942 is a deficient number, since it is larger than the sum of its proper divisors (448058).

811942 is a wasteful number, since it uses less digits than its factorization.

811942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14030.

The product of its digits is 576, while the sum is 25.

The square root of 811942 is about 901.0782429956. The cubic root of 811942 is about 93.2914125800.

The spelling of 811942 in words is "eight hundred eleven thousand, nine hundred forty-two".