1940845 has 4 divisors (see below), whose sum is σ = 2329020. Its totient is φ = 1552672.

The previous prime is 1940833. The next prime is 1940849. The reversal of 1940845 is 5480491.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 447561 + 1493284 = 669^2 + 1222^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940845 - 2¹⁵ = 1908077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194080 + ... + 194089.

It is an arithmetic number, because the mean of its divisors is an integer number (582255).

2^1940845 is an apocalyptic number.

It is an amenable number.

1940845 is a deficient number, since it is larger than the sum of its proper divisors (388175).

1940845 is an equidigital number, since it uses as much as digits as its factorization.

1940845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388174.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1940845 is about 1393.1421320167. The cubic root of 1940845 is about 124.7374757006.

The spelling of 1940845 in words is "one million, nine hundred forty thousand, eight hundred forty-five".