1440921 has 8 divisors (see below), whose sum is σ = 1927264. Its totient is φ = 957600.

The previous prime is 1440913. The next prime is 1440949. The reversal of 1440921 is 1290441.

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

It is not a de Polignac number, because 1440921 - 2³ = 1440913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440961) 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 7 ways as a sum of consecutive naturals, for example, 846 + ... + 1896.

It is an arithmetic number, because the mean of its divisors is an integer number (240908).

2^1440921 is an apocalyptic number.

It is an amenable number.

1440921 is a deficient number, since it is larger than the sum of its proper divisors (486343).

1440921 is a wasteful number, since it uses less digits than its factorization.

1440921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1440921 is about 1200.3836886596. The cubic root of 1440921 is about 112.9483931733.

The spelling of 1440921 in words is "one million, four hundred forty thousand, nine hundred twenty-one".