1321546752 has 264 divisors, whose sum is σ = 4077230976. Its totient is φ = 427327488.

The previous prime is 1321546741. The next prime is 1321546769. The reversal of 1321546752 is 2576451231.

1321546752 is a `hidden beast` number, since 132 + 15 + 467 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11695048 + ... + 11695160.

Almost surely, 2^1321546752 is an apocalyptic number.

1321546752 is a gapful number since it is divisible by the number (12) 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 1321546752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2038615488).

1321546752 is an abundant number, since it is smaller than the sum of its proper divisors (2755684224).

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

1321546752 is an equidigital number, since it uses as much as digits as its factorization.

1321546752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 165 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 1321546752 is about 36353.0844908654. The cubic root of 1321546752 is about 1097.3896096786.

Adding to 1321546752 its reverse (2576451231), we get a palindrome (3897997983).

The spelling of 1321546752 in words is "one billion, three hundred twenty-one million, five hundred forty-six thousand, seven hundred fifty-two".