1440561 has 16 divisors (see below), whose sum is σ = 2048000. Its totient is φ = 898128.

The previous prime is 1440557. The next prime is 1440577. The reversal of 1440561 is 1650441.

It is not a de Polignac number, because 1440561 - 2² = 1440557 is a prime.

It is a Duffinian number.

1440561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1440511) 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, 7140 + ... + 7338.

It is an arithmetic number, because the mean of its divisors is an integer number (128000).

2^1440561 is an apocalyptic number.

It is an amenable number.

1440561 is a deficient number, since it is larger than the sum of its proper divisors (607439).

1440561 is a wasteful number, since it uses less digits than its factorization.

1440561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1440561 is about 1200.2337272382. The cubic root of 1440561 is about 112.9389860399.

The spelling of 1440561 in words is "one million, four hundred forty thousand, five hundred sixty-one".