1920043 has 2 divisors, whose sum is σ = 1920044. Its totient is φ = 1920042.

The previous prime is 1920013. The next prime is 1920049. The reversal of 1920043 is 3400291.

It is a strong prime.

It is an emirp because it is prime and its reverse (3400291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1920043 - 2⁵ = 1920011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1920043.

It is not a weakly prime, because it can be changed into another prime (1920049) 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 as a sum of consecutive naturals, namely, 960021 + 960022.

It is an arithmetic number, because the mean of its divisors is an integer number (960022).

2^1920043 is an apocalyptic number.

1920043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920043 is an equidigital number, since it uses as much as digits as its factorization.

1920043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1920043 is about 1385.6561622567. The cubic root of 1920043 is about 124.2902280854.

The spelling of 1920043 in words is "one million, nine hundred twenty thousand, forty-three".