1942 has 4 divisors (see below), whose sum is σ = 2916. Its totient is φ = 970.
The previous prime is 1933. The next prime is 1949. The reversal of 1942 is 2491.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2491 = 47 ⋅53.
It is a plaindrome in base 12.
It is a nialpdrome in base 7 and base 13.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1949) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484 + ... + 487.
It is an arithmetic number, because the mean of its divisors is an integer number (729).
21942 is an apocalyptic number.
1942 is a deficient number, since it is larger than the sum of its proper divisors (974).
1942 is an equidigital number, since it uses as much as digits as its factorization.
1942 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 973.
The product of its digits is 72, while the sum is 16.
The square root of 1942 is about 44.0681290731. The cubic root of 1942 is about 12.4762214618.
It can be divided in two parts, 194 and 2, that added together give a square (196 = 142).
The spelling of 1942 in words is "one thousand, nine hundred forty-two".
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