1440120013 has 4 divisors (see below), whose sum is σ = 1440248128. Its totient is φ = 1439991900.

The previous prime is 1440120001. The next prime is 1440120037. The reversal of 1440120013 is 3100210441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3100210441 = 2767 ⋅1120423.

It is a cyclic number.

It is not a de Polignac number, because 1440120013 - 2¹⁷ = 1439988941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440120053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45381 + ... + 70282.

It is an arithmetic number, because the mean of its divisors is an integer number (360062032).

Almost surely, 2^1440120013 is an apocalyptic number.

It is an amenable number.

1440120013 is a deficient number, since it is larger than the sum of its proper divisors (128115).

1440120013 is a wasteful number, since it uses less digits than its factorization.

1440120013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128114.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1440120013 is about 37948.9131991945. The cubic root of 1440120013 is about 1129.2746050516.

Adding to 1440120013 its reverse (3100210441), we get a palindrome (4540330454).

The spelling of 1440120013 in words is "one billion, four hundred forty million, one hundred twenty thousand, thirteen".