1944161 has 4 divisors (see below), whose sum is σ = 1950612. Its totient is φ = 1937712.

The previous prime is 1944157. The next prime is 1944169. The reversal of 1944161 is 1614491.

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 1030225 + 913936 = 1015^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1944161 - 2² = 1944157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1944161.

It is not an unprimeable number, because it can be changed into a prime (1944169) 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, 2750 + ... + 3383.

It is an arithmetic number, because the mean of its divisors is an integer number (487653).

2^1944161 is an apocalyptic number.

It is an amenable number.

1944161 is a deficient number, since it is larger than the sum of its proper divisors (6451).

1944161 is an equidigital number, since it uses as much as digits as its factorization.

1944161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450.

The product of its digits is 864, while the sum is 26.

The square root of 1944161 is about 1394.3317395799. The cubic root of 1944161 is about 124.8084746943.

The spelling of 1944161 in words is "one million, nine hundred forty-four thousand, one hundred sixty-one".