1243143252 has 36 divisors (see below), whose sum is σ = 3384113460. Its totient is φ = 382505472.

The previous prime is 1243143197. The next prime is 1243143277. The reversal of 1243143252 is 2523413421.

1243143252 is a `hidden beast` number, since 1 + 24 + 314 + 325 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 134652816 + 1108490436 = 11604^2 + 33294^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1327677 + ... + 1328612.

Almost surely, 2^1243143252 is an apocalyptic number.

1243143252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1243143252 is an abundant number, since it is smaller than the sum of its proper divisors (2140970208).

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

1243143252 is a wasteful number, since it uses less digits than its factorization.

1243143252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656312 (or 2656307 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1243143252 is about 35258.2366547166. The cubic root of 1243143252 is about 1075.2440771186.

Adding to 1243143252 its reverse (2523413421), we get a palindrome (3766556673).

The spelling of 1243143252 in words is "one billion, two hundred forty-three million, one hundred forty-three thousand, two hundred fifty-two".