1321430016 has 88 divisors (see below), whose sum is σ = 3533678784. Its totient is φ = 439029760.

The previous prime is 1321430003. The next prime is 1321430027. The reversal of 1321430016 is 6100341231.

It is a junction number, because it is equal to n+sod(n) for n = 1321429974 and 1321430001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1360411 + ... + 1361381.

Almost surely, 2^1321430016 is an apocalyptic number.

1321430016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321430016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1766839392).

1321430016 is an abundant number, since it is smaller than the sum of its proper divisors (2212248768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321430016 is an equidigital number, since it uses as much as digits as its factorization.

1321430016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1419 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1321430016 is about 36351.4788695041. The cubic root of 1321430016 is about 1097.3572968741.

Adding to 1321430016 its reverse (6100341231), we get a palindrome (7421771247).

The spelling of 1321430016 in words is "one billion, three hundred twenty-one million, four hundred thirty thousand, sixteen".