1251535012 has 24 divisors (see below), whose sum is σ = 2695614656. Its totient is φ = 495112608.

The previous prime is 1251534929. The next prime is 1251535039. The reversal of 1251535012 is 2105351521.

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 7 ways as a sum of consecutive naturals, for example, 1718778 + ... + 1719505.

Almost surely, 2^1251535012 is an apocalyptic number.

It is an amenable number.

1251535012 is an abundant number, since it is smaller than the sum of its proper divisors (1444079644).

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

1251535012 is a wasteful number, since it uses less digits than its factorization.

1251535012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438307 (or 3438305 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1251535012 is about 35377.0407467894. The cubic root of 1251535012 is about 1077.6581090580.

Adding to 1251535012 its reverse (2105351521), we get a palindrome (3356886533).

The spelling of 1251535012 in words is "one billion, two hundred fifty-one million, five hundred thirty-five thousand, twelve".