1321031424 has 72 divisors (see below), whose sum is σ = 3610971280. Its totient is φ = 428433408.

The previous prime is 1321031401. The next prime is 1321031431. The reversal of 1321031424 is 4241301231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321031424.

It is a congruent number.

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, 5172 + ... + 51660.

Almost surely, 2^1321031424 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 1321031424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1805485640).

1321031424 is an abundant number, since it is smaller than the sum of its proper divisors (2289939856).

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

1321031424 is an equidigital number, since it uses as much as digits as its factorization.

1321031424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46545 (or 46531 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1321031424 is about 36345.9959830516. The cubic root of 1321031424 is about 1097.2469513090.

Adding to 1321031424 its reverse (4241301231), we get a palindrome (5562332655).

The spelling of 1321031424 in words is "one billion, three hundred twenty-one million, thirty-one thousand, four hundred twenty-four".