1321430144 has 16 divisors (see below), whose sum is σ = 2632536870. Its totient is φ = 660715008.

The previous prime is 1321430101. The next prime is 1321430177. The reversal of 1321430144 is 4410341231.

It can be written as a sum of positive squares in only one way, i.e., 1258830400 + 62599744 = 35480^2 + 7912^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-4 number, since 4×1321430144⁴ (a number of 38 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5161709 + ... + 5161964.

Almost surely, 2^1321430144 is an apocalyptic number.

It is an amenable number.

1321430144 is a deficient number, since it is larger than the sum of its proper divisors (1311106726).

1321430144 is an equidigital number, since it uses as much as digits as its factorization.

1321430144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10323687 (or 10323675 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1321430144 is about 36351.4806300926. The cubic root of 1321430144 is about 1097.3573323058.

Adding to 1321430144 its reverse (4410341231), we get a palindrome (5731771375).

The spelling of 1321430144 in words is "one billion, three hundred twenty-one million, four hundred thirty thousand, one hundred forty-four".