1321445200 has 60 divisors (see below), whose sum is σ = 3197746720. Its totient is φ = 524753280.

The previous prime is 1321445171. The next prime is 1321445239. The reversal of 1321445200 is 25441231.

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, 43717 + ... + 67483.

Almost surely, 2^1321445200 is an apocalyptic number.

1321445200 is a gapful number since it is divisible by the number (10) 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 1321445200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1598873360).

1321445200 is an abundant number, since it is smaller than the sum of its proper divisors (1876301520).

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

1321445200 is a wasteful number, since it uses less digits than its factorization.

1321445200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23924 (or 23913 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1321445200 is about 36351.6877187291. The cubic root of 1321445200 is about 1097.3614999493.

Adding to 1321445200 its reverse (25441231), we get a palindrome (1346886431).

The spelling of 1321445200 in words is "one billion, three hundred twenty-one million, four hundred forty-five thousand, two hundred".