1942191 has 8 divisors (see below), whose sum is σ = 2877360. Its totient is φ = 1294776.

The previous prime is 1942183. The next prime is 1942201. The reversal of 1942191 is 1912491.

It is not a de Polignac number, because 1942191 - 2³ = 1942183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 71933 = 1942191 / (1 + 9 + 4 + 2 + 1 + 9 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942111) 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 in 7 ways as a sum of consecutive naturals, for example, 35940 + ... + 35993.

It is an arithmetic number, because the mean of its divisors is an integer number (359670).

2^1942191 is an apocalyptic number.

1942191 is a deficient number, since it is larger than the sum of its proper divisors (935169).

1942191 is an equidigital number, since it uses as much as digits as its factorization.

1942191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71942 (or 71936 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 1942191 is about 1393.6251289353. The cubic root of 1942191 is about 124.7663046977.

The spelling of 1942191 in words is "one million, nine hundred forty-two thousand, one hundred ninety-one".