1440454221 has 12 divisors (see below), whose sum is σ = 2084750460. Its totient is φ = 958413120.

The previous prime is 1440454219. The next prime is 1440454247. The reversal of 1440454221 is 1224540441.

It can be written as a sum of positive squares in 2 ways, for example, as 1334075625 + 106378596 = 36525^2 + 10314^2 .

It is not a de Polignac number, because 1440454221 - 2¹ = 1440454219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440453221) 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, 152640 + ... + 161801.

It is an arithmetic number, because the mean of its divisors is an integer number (173729205).

Almost surely, 2^1440454221 is an apocalyptic number.

It is an amenable number.

1440454221 is a deficient number, since it is larger than the sum of its proper divisors (644296239).

1440454221 is a wasteful number, since it uses less digits than its factorization.

1440454221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314956 (or 314953 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 1440454221 is about 37953.3163373110. The cubic root of 1440454221 is about 1129.3619550438.

Adding to 1440454221 its reverse (1224540441), we get a palindrome (2664994662).

The spelling of 1440454221 in words is "one billion, four hundred forty million, four hundred fifty-four thousand, two hundred twenty-one".