1440345 has 16 divisors (see below), whose sum is σ = 2325312. Its totient is φ = 761280.

The previous prime is 1440317. The next prime is 1440349. The reversal of 1440345 is 5430441.

It is not a de Polignac number, because 1440345 - 2⁹ = 1439833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440349) 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 15 ways as a sum of consecutive naturals, for example, 1599 + ... + 2331.

It is an arithmetic number, because the mean of its divisors is an integer number (145332).

2^1440345 is an apocalyptic number.

1440345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1440345 is a deficient number, since it is larger than the sum of its proper divisors (884967).

1440345 is a wasteful number, since it uses less digits than its factorization.

1440345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1440345 is about 1200.1437413910. The cubic root of 1440345 is about 112.9333410076.

Adding to 1440345 its reverse (5430441), we get a palindrome (6870786).

The spelling of 1440345 in words is "one million, four hundred forty thousand, three hundred forty-five".