1445440 has 28 divisors (see below), whose sum is σ = 3442716. Its totient is φ = 578048.

The previous prime is 1445429. The next prime is 1445443. The reversal of 1445440 is 445441.

It can be written as a sum of positive squares in 2 ways, for example, as 173056 + 1272384 = 416^2 + 1128^2 .

It is not an unprimeable number, because it can be changed into a prime (1445443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1939 + ... + 2578.

2^1445440 is an apocalyptic number.

1445440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445440 is an abundant number, since it is smaller than the sum of its proper divisors (1997276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1445440 is an equidigital number, since it uses as much as digits as its factorization.

1445440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534 (or 4524 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1445440 is about 1202.2645299600. The cubic root of 1445440 is about 113.0663457726.

Subtracting from 1445440 its reverse (445441), we obtain a palindrome (999999).

It can be divided in two parts, 14 and 45440, that added together give a palindrome (45454).

The spelling of 1445440 in words is "one million, four hundred forty-five thousand, four hundred forty".