1321001424 has 60 divisors (see below), whose sum is σ = 3710720832. Its totient is φ = 438696000.

The previous prime is 1321001399. The next prime is 1321001447. The reversal of 1321001424 is 4241001231.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1321001397 and 1321001406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22099 + ... + 55949.

Almost surely, 2^1321001424 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 1321001424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1855360416).

1321001424 is an abundant number, since it is smaller than the sum of its proper divisors (2389719408).

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

1321001424 is a wasteful number, since it uses less digits than its factorization.

1321001424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34136 (or 34127 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1321001424 is about 36345.5832805033. The cubic root of 1321001424 is about 1097.2386452594.

Adding to 1321001424 its reverse (4241001231), we get a palindrome (5562002655).

The spelling of 1321001424 in words is "one billion, three hundred twenty-one million, one thousand, four hundred twenty-four".