1231303752 has 144 divisors (see below), whose sum is σ = 3893139900. Its totient is φ = 350542080.

The previous prime is 1231303751. The next prime is 1231303769. The reversal of 1231303752 is 2573031321.

It can be written as a sum of positive squares in 2 ways, for example, as 1109289636 + 122014116 = 33306^2 + 11046^2 .

It is a super-2 number, since 2×1231303752² = 3032217859378555008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231303751) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 1484874 + ... + 1485702.

Almost surely, 2^1231303752 is an apocalyptic number.

1231303752 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 1231303752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1946569950).

1231303752 is an abundant number, since it is smaller than the sum of its proper divisors (2661836148).

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

1231303752 is a wasteful number, since it uses less digits than its factorization.

1231303752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1262 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 1231303752 is about 35089.9380449724. The cubic root of 1231303752 is about 1071.8196979937.

The spelling of 1231303752 in words is "one billion, two hundred thirty-one million, three hundred three thousand, seven hundred fifty-two".