1942891 has 2 divisors, whose sum is σ = 1942892. Its totient is φ = 1942890.

The previous prime is 1942877. The next prime is 1942901. The reversal of 1942891 is 1982491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1942891 - 2⁵ = 1942859 is a prime.

1942891 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1942841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971445 + 971446.

It is an arithmetic number, because the mean of its divisors is an integer number (971446).

2^1942891 is an apocalyptic number.

1942891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1942891 is an equidigital number, since it uses as much as digits as its factorization.

1942891 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1942891 is about 1393.8762498873. The cubic root of 1942891 is about 124.7812922251.

The spelling of 1942891 in words is "one million, nine hundred forty-two thousand, eight hundred ninety-one".