1251312252 has 12 divisors (see below), whose sum is σ = 2919728616. Its totient is φ = 417104080.

The previous prime is 1251312239. The next prime is 1251312253. The reversal of 1251312252 is 2522131521.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251312253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52137999 + ... + 52138022.

It is an arithmetic number, because the mean of its divisors is an integer number (243310718).

Almost surely, 2^1251312252 is an apocalyptic number.

1251312252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251312252 is an abundant number, since it is smaller than the sum of its proper divisors (1668416364).

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

1251312252 is a wasteful number, since it uses less digits than its factorization.

1251312252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104276028 (or 104276026 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 1251312252 is about 35373.8922370722. The cubic root of 1251312252 is about 1077.5941680143.

Adding to 1251312252 its reverse (2522131521), we get a palindrome (3773443773).

The spelling of 1251312252 in words is "one billion, two hundred fifty-one million, three hundred twelve thousand, two hundred fifty-two".