1440401221 has 8 divisors (see below), whose sum is σ = 1646503424. Its totient is φ = 1234381680.

The previous prime is 1440401189. The next prime is 1440401251. The reversal of 1440401221 is 1221040441.

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

It is not a de Polignac number, because 1440401221 - 2⁵ = 1440401189 is a prime.

It is a super-4 number, since 4×1440401221⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440401251) 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, 22771 + ... + 58303.

It is an arithmetic number, because the mean of its divisors is an integer number (205812928).

Almost surely, 2^1440401221 is an apocalyptic number.

It is an amenable number.

1440401221 is a deficient number, since it is larger than the sum of its proper divisors (206102203).

1440401221 is an equidigital number, since it uses as much as digits as its factorization.

1440401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41331.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1440401221 is about 37952.6181046842. The cubic root of 1440401221 is about 1129.3481036449.

Adding to 1440401221 its reverse (1221040441), we get a palindrome (2661441662).

The spelling of 1440401221 in words is "one billion, four hundred forty million, four hundred one thousand, two hundred twenty-one".