1440121332 has 36 divisors (see below), whose sum is σ = 3638654880. Its totient is φ = 443113632.

The previous prime is 1440121303. The next prime is 1440121339. The reversal of 1440121332 is 2331210441.

It is a junction number, because it is equal to n+sod(n) for n = 1440121299 and 1440121308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440121339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 353032 + ... + 357087.

Almost surely, 2^1440121332 is an apocalyptic number.

1440121332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1440121332 is an abundant number, since it is smaller than the sum of its proper divisors (2198533548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440121332 is a wasteful number, since it uses less digits than its factorization.

1440121332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710152 (or 710137 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1440121332 is about 37948.9305778173. The cubic root of 1440121332 is about 1129.2749498175.

Adding to 1440121332 its reverse (2331210441), we get a palindrome (3771331773).

The spelling of 1440121332 in words is "one billion, four hundred forty million, one hundred twenty-one thousand, three hundred thirty-two".