1321271424 has 192 divisors, whose sum is σ = 4185492480. Its totient is φ = 396748800.

The previous prime is 1321271401. The next prime is 1321271459. The reversal of 1321271424 is 4241721231.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1608934 + ... + 1609754.

It is an arithmetic number, because the mean of its divisors is an integer number (21799440).

Almost surely, 2^1321271424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321271424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2092746240).

1321271424 is an abundant number, since it is smaller than the sum of its proper divisors (2864221056).

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

1321271424 is a wasteful number, since it uses less digits than its factorization.

1321271424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 964 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 1321271424 is about 36349.2974347511. The cubic root of 1321271424 is about 1097.3133951795.

Adding to 1321271424 its reverse (4241721231), we get a palindrome (5562992655).

The spelling of 1321271424 in words is "one billion, three hundred twenty-one million, two hundred seventy-one thousand, four hundred twenty-four".