1440344121 has 8 divisors (see below), whose sum is σ = 1932241440. Its totient is φ = 954338112.

The previous prime is 1440344107. The next prime is 1440344123. The reversal of 1440344121 is 1214430441.

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

It is not a de Polignac number, because 1440344121 - 2¹⁰ = 1440343097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1440344091 and 1440344100.

It is not an unprimeable number, because it can be changed into a prime (1440344123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1472256 + ... + 1473233.

It is an arithmetic number, because the mean of its divisors is an integer number (241530180).

Almost surely, 2^1440344121 is an apocalyptic number.

It is an amenable number.

1440344121 is a deficient number, since it is larger than the sum of its proper divisors (491897319).

1440344121 is a wasteful number, since it uses less digits than its factorization.

1440344121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945655.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1440344121 is about 37951.8658434602. The cubic root of 1440344121 is about 1129.3331803426. Note that the first 3 decimals are identical.

Adding to 1440344121 its reverse (1214430441), we get a palindrome (2654774562).

The spelling of 1440344121 in words is "one billion, four hundred forty million, three hundred forty-four thousand, one hundred twenty-one".