1441564321 has 4 divisors (see below), whose sum is σ = 1441808532. Its totient is φ = 1441320112.

The previous prime is 1441564309. The next prime is 1441564357. The reversal of 1441564321 is 1234651441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1234651441 = 1879 ⋅657079.

It can be written as a sum of positive squares in 2 ways, for example, as 389470225 + 1052094096 = 19735^2 + 32436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1441564321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1441564921) 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, 113026 + ... + 125131.

It is an arithmetic number, because the mean of its divisors is an integer number (360452133).

Almost surely, 2^1441564321 is an apocalyptic number.

It is an amenable number.

1441564321 is a deficient number, since it is larger than the sum of its proper divisors (244211).

1441564321 is an equidigital number, since it uses as much as digits as its factorization.

1441564321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244210.

The product of its digits is 11520, while the sum is 31.

The square root of 1441564321 is about 37967.9380662158. The cubic root of 1441564321 is about 1129.6519984588.

The spelling of 1441564321 in words is "one billion, four hundred forty-one million, five hundred sixty-four thousand, three hundred twenty-one".