1944865 has 8 divisors (see below), whose sum is σ = 2513448. Its totient is φ = 1436160.

The previous prime is 1944853. The next prime is 1944881. The reversal of 1944865 is 5684491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 73441 + 1871424 = 271^2 + 1368^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1944865 - 2⁷ = 1944737 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14896 + ... + 15025.

It is an arithmetic number, because the mean of its divisors is an integer number (314181).

2^1944865 is an apocalyptic number.

It is an amenable number.

1944865 is a deficient number, since it is larger than the sum of its proper divisors (568583).

1944865 is a wasteful number, since it uses less digits than its factorization.

1944865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29939.

The product of its digits is 34560, while the sum is 37.

The square root of 1944865 is about 1394.5841674134. The cubic root of 1944865 is about 124.8235376723.

It can be divided in two parts, 194486 and 5, that added together give a palindrome (194491).

The spelling of 1944865 in words is "one million, nine hundred forty-four thousand, eight hundred sixty-five".