1312240752 has 120 divisors (see below), whose sum is σ = 3842879040. Its totient is φ = 417576960.

The previous prime is 1312240747. The next prime is 1312240753. The reversal of 1312240752 is 2570422131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312240753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275124 + ... + 279852.

It is an arithmetic number, because the mean of its divisors is an integer number (32023992).

Almost surely, 2^1312240752 is an apocalyptic number.

1312240752 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 1312240752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1921439520).

1312240752 is an abundant number, since it is smaller than the sum of its proper divisors (2530638288).

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

1312240752 is a wasteful number, since it uses less digits than its factorization.

1312240752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831 (or 4822 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1312240752 is about 36224.8637264518. The cubic root of 1312240752 is about 1094.8076925059.

Adding to 1312240752 its reverse (2570422131), we get a palindrome (3882662883).

It can be divided in two parts, 1312 and 240752, that added together give a square (242064 = 492²).

The spelling of 1312240752 in words is "one billion, three hundred twelve million, two hundred forty thousand, seven hundred fifty-two".