1312245252 has 96 divisors (see below), whose sum is σ = 3534397440. Its totient is φ = 420590880.

The previous prime is 1312245239. The next prime is 1312245257. The reversal of 1312245252 is 2525422131.

1312245252 is a `hidden beast` number, since 13 + 122 + 4 + 525 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1312245257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 557943 + ... + 560289.

It is an arithmetic number, because the mean of its divisors is an integer number (36816640).

Almost surely, 2^1312245252 is an apocalyptic number.

1312245252 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 1312245252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1767198720).

1312245252 is an abundant number, since it is smaller than the sum of its proper divisors (2222152188).

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

1312245252 is a wasteful number, since it uses less digits than its factorization.

1312245252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558 (or 2550 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1312245252 is about 36224.9258384334. The cubic root of 1312245252 is about 1094.8089439605.

Adding to 1312245252 its reverse (2525422131), we get a palindrome (3837667383).

The spelling of 1312245252 in words is "one billion, three hundred twelve million, two hundred forty-five thousand, two hundred fifty-two".