1940871 has 4 divisors (see below), whose sum is σ = 2587832. Its totient is φ = 1293912.

The previous prime is 1940849. The next prime is 1940881. The reversal of 1940871 is 1780491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1780491 = 3 ⋅593497.

It is not a de Polignac number, because 1940871 - 2¹⁴ = 1924487 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940821) 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 3 ways as a sum of consecutive naturals, for example, 323476 + ... + 323481.

It is an arithmetic number, because the mean of its divisors is an integer number (646958).

2^1940871 is an apocalyptic number.

1940871 is a deficient number, since it is larger than the sum of its proper divisors (646961).

1940871 is an equidigital number, since it uses as much as digits as its factorization.

1940871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646960.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 1940871 is about 1393.1514634095. The cubic root of 1940871 is about 124.7380327019.

The spelling of 1940871 in words is "one million, nine hundred forty thousand, eight hundred seventy-one".