1231413252 has 12 divisors (see below), whose sum is σ = 2873297616. Its totient is φ = 410471080.

The previous prime is 1231413233. The next prime is 1231413259. The reversal of 1231413252 is 2523141321.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1231413259) 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 3 ways as a sum of consecutive naturals, for example, 51308874 + ... + 51308897.

It is an arithmetic number, because the mean of its divisors is an integer number (239441468).

Almost surely, 2^1231413252 is an apocalyptic number.

1231413252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231413252 is an abundant number, since it is smaller than the sum of its proper divisors (1641884364).

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

1231413252 is a wasteful number, since it uses less digits than its factorization.

1231413252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102617778 (or 102617776 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 1231413252 is about 35091.4982866221. The cubic root of 1231413252 is about 1071.8514694061.

Adding to 1231413252 its reverse (2523141321), we get a palindrome (3754554573).

It can be divided in two parts, 1231413 and 252, that added together give a triangular number (1231665 = T₁₅₆₉).

The spelling of 1231413252 in words is "one billion, two hundred thirty-one million, four hundred thirteen thousand, two hundred fifty-two".