1440121413 has 4 divisors (see below), whose sum is σ = 1920161888. Its totient is φ = 960080940.

The previous prime is 1440121387. The next prime is 1440121421. The reversal of 1440121413 is 3141210441.

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.

It is not a de Polignac number, because 1440121413 - 2⁶ = 1440121349 is a prime.

It is a super-2 number, since 2×1440121413² = 4147899368362233138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1440121413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440121013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240020233 + ... + 240020238.

It is an arithmetic number, because the mean of its divisors is an integer number (480040472).

Almost surely, 2^1440121413 is an apocalyptic number.

It is an amenable number.

1440121413 is a deficient number, since it is larger than the sum of its proper divisors (480040475).

1440121413 is an equidigital number, since it uses as much as digits as its factorization.

1440121413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480040474.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1440121413 is about 37948.9316450411. The cubic root of 1440121413 is about 1129.2749709896.

Adding to 1440121413 its reverse (3141210441), we get a palindrome (4581331854).

The spelling of 1440121413 in words is "one billion, four hundred forty million, one hundred twenty-one thousand, four hundred thirteen".