1944559 has 4 divisors (see below), whose sum is σ = 1964704. Its totient is φ = 1924416.

The previous prime is 1944557. The next prime is 1944563. The reversal of 1944559 is 9554491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9554491 = 61 ⋅156631.

It is a cyclic number.

It is not a de Polignac number, because 1944559 - 2¹ = 1944557 is a prime.

It is an Ulam 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 (1944557) 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, 9927 + ... + 10120.

It is an arithmetic number, because the mean of its divisors is an integer number (491176).

2^1944559 is an apocalyptic number.

1944559 is a deficient number, since it is larger than the sum of its proper divisors (20145).

1944559 is an equidigital number, since it uses as much as digits as its factorization.

1944559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20144.

The product of its digits is 32400, while the sum is 37.

The square root of 1944559 is about 1394.4744529750. The cubic root of 1944559 is about 124.8169908587.

It can be divided in two parts, 194 and 4559, that added together give a triangular number (4753 = T₉₇).

The spelling of 1944559 in words is "one million, nine hundred forty-four thousand, five hundred fifty-nine".