1440556 has 18 divisors (see below), whose sum is σ = 2731092. Its totient is φ = 664560.

The previous prime is 1440553. The next prime is 1440557. The reversal of 1440556 is 6550441.

It is a self number, because there is not a number n which added to its sum of digits gives 1440556.

It is not an unprimeable number, because it can be changed into a prime (1440553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 390 + ... + 1741.

2^1440556 is an apocalyptic number.

It is an amenable number.

1440556 is a deficient number, since it is larger than the sum of its proper divisors (1290536).

1440556 is a wasteful number, since it uses less digits than its factorization.

1440556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161 (or 2146 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1440556 is about 1200.2316443087. The cubic root of 1440556 is about 112.9388553742.

Adding to 1440556 its reverse (6550441), we get a palindrome (7990997).

The spelling of 1440556 in words is "one million, four hundred forty thousand, five hundred fifty-six".