1942819 has 4 divisors (see below), whose sum is σ = 1945944. Its totient is φ = 1939696.

The previous prime is 1942793. The next prime is 1942841. The reversal of 1942819 is 9182491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9182491 = 19 ⋅483289.

It is a cyclic number.

It is not a de Polignac number, because 1942819 - 2⁹ = 1942307 is a prime.

It is a super-2 number, since 2×1942819² = 7549091333522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1942859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (486486).

2^1942819 is an apocalyptic number.

1942819 is a deficient number, since it is larger than the sum of its proper divisors (3125).

1942819 is an equidigital number, since it uses as much as digits as its factorization.

1942819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124.

The product of its digits is 5184, while the sum is 34.

The square root of 1942819 is about 1393.8504223912. The cubic root of 1942819 is about 124.7797508170.

The spelling of 1942819 in words is "one million, nine hundred forty-two thousand, eight hundred nineteen".