1950805 has 4 divisors (see below), whose sum is σ = 2340972. Its totient is φ = 1560640.

The previous prime is 1950803. The next prime is 1950827. The reversal of 1950805 is 5080591.

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 820836 + 1129969 = 906^2 + 1063^2 .

It is not a de Polignac number, because 1950805 - 2¹ = 1950803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1950803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195076 + ... + 195085.

It is an arithmetic number, because the mean of its divisors is an integer number (585243).

2^1950805 is an apocalyptic number.

It is an amenable number.

1950805 is a deficient number, since it is larger than the sum of its proper divisors (390167).

1950805 is an equidigital number, since it uses as much as digits as its factorization.

1950805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390166.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1950805 is about 1396.7122108724. The cubic root of 1950805 is about 124.9504870570.

The spelling of 1950805 in words is "one million, nine hundred fifty thousand, eight hundred five".