1440020032421 has 8 divisors (see below), whose sum is σ = 1502672789184. Its totient is φ = 1377370874880.

The previous prime is 1440020032417. The next prime is 1440020032433. The reversal of 1440020032421 is 1242300200441.

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

It is a cyclic number.

It is not a de Polignac number, because 1440020032421 - 2² = 1440020032417 is a prime.

It is a super-2 number, since 2×1440020032421² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440020032411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65756 + ... + 1698341.

It is an arithmetic number, because the mean of its divisors is an integer number (187834098648).

Almost surely, 2^{1440020032421} is an apocalyptic number.

It is an amenable number.

1440020032421 is a deficient number, since it is larger than the sum of its proper divisors (62652756763).

1440020032421 is a wasteful number, since it uses less digits than its factorization.

1440020032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799611.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 1440020032421 its reverse (1242300200441), we get a palindrome (2682320232862).

The spelling of 1440020032421 in words is "one trillion, four hundred forty billion, twenty million, thirty-two thousand, four hundred twenty-one".