1321446450 has 72 divisors (see below), whose sum is σ = 3308417712. Its totient is φ = 349052480.

The previous prime is 1321446443. The next prime is 1321446461. The reversal of 1321446450 is 546441231.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5821237 + ... + 5821463.

It is an arithmetic number, because the mean of its divisors is an integer number (45950246).

Almost surely, 2^1321446450 is an apocalyptic number.

1321446450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321446450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1654208856).

1321446450 is an abundant number, since it is smaller than the sum of its proper divisors (1986971262).

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

1321446450 is a wasteful number, since it uses less digits than its factorization.

1321446450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1321446450 is about 36351.7049118745. The cubic root of 1321446450 is about 1097.3618459598.

Adding to 1321446450 its reverse (546441231), we get a palindrome (1867887681).

The spelling of 1321446450 in words is "one billion, three hundred twenty-one million, four hundred forty-six thousand, four hundred fifty".