1231166252 has 12 divisors (see below), whose sum is σ = 2155279896. Its totient is φ = 615372000.

The previous prime is 1231166201. The next prime is 1231166291. The reversal of 1231166252 is 2526611321.

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 3 ways as a sum of consecutive naturals, for example, 39278 + ... + 63285.

It is an arithmetic number, because the mean of its divisors is an integer number (179606658).

Almost surely, 2^1231166252 is an apocalyptic number.

It is an amenable number.

1231166252 is a deficient number, since it is larger than the sum of its proper divisors (924113644).

1231166252 is a wasteful number, since it uses less digits than its factorization.

1231166252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105568 (or 105566 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1231166252 is about 35087.9787391636. The cubic root of 1231166252 is about 1071.7797997167.

Adding to 1231166252 its reverse (2526611321), we get a palindrome (3757777573).

The spelling of 1231166252 in words is "one billion, two hundred thirty-one million, one hundred sixty-six thousand, two hundred fifty-two".