1440591 has 8 divisors (see below), whose sum is σ = 1926960. Its totient is φ = 957312.

The previous prime is 1440589. The next prime is 1440611. The reversal of 1440591 is 1950441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1440591 - 2¹ = 1440589 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745 + ... + 1853.

It is an arithmetic number, because the mean of its divisors is an integer number (240870).

2^1440591 is an apocalyptic number.

1440591 is a deficient number, since it is larger than the sum of its proper divisors (486369).

1440591 is a wasteful number, since it uses less digits than its factorization.

1440591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1440591 is about 1200.2462247389. The cubic root of 1440591 is about 112.9397700275.

The spelling of 1440591 in words is "one million, four hundred forty thousand, five hundred ninety-one".