1920143 has 2 divisors, whose sum is σ = 1920144. Its totient is φ = 1920142.

The previous prime is 1920101. The next prime is 1920161. The reversal of 1920143 is 3410291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1920143 - 2¹⁰ = 1919119 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920173) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960071 + 960072.

It is an arithmetic number, because the mean of its divisors is an integer number (960072).

2^1920143 is an apocalyptic number.

1920143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920143 is an equidigital number, since it uses as much as digits as its factorization.

1920143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1920143 is about 1385.6922457747. The cubic root of 1920143 is about 124.2923858161.

The spelling of 1920143 in words is "one million, nine hundred twenty thousand, one hundred forty-three".