1231126252 has 6 divisors (see below), whose sum is σ = 2154470948. Its totient is φ = 615563124.

The previous prime is 1231126207. The next prime is 1231126289. The reversal of 1231126252 is 2526211321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153890778 + ... + 153890785.

Almost surely, 2^1231126252 is an apocalyptic number.

It is an amenable number.

1231126252 is a deficient number, since it is larger than the sum of its proper divisors (923344696).

1231126252 is a wasteful number, since it uses less digits than its factorization.

1231126252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307781567 (or 307781565 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1231126252 is about 35087.4087387484. The cubic root of 1231126252 is about 1071.7681923874.

Adding to 1231126252 its reverse (2526211321), we get a palindrome (3757337573).

The spelling of 1231126252 in words is "one billion, two hundred thirty-one million, one hundred twenty-six thousand, two hundred fifty-two".