1251561134252 has 48 divisors (see below), whose sum is σ = 2576136192000. Its totient is φ = 524519012160.

The previous prime is 1251561134251. The next prime is 1251561134321. The reversal of 1251561134252 is 2524311651521.

It is not an unprimeable number, because it can be changed into a prime (1251561134251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782252 + ... + 1764947.

It is an arithmetic number, because the mean of its divisors is an integer number (53669504000).

Almost surely, 2^{1251561134252} is an apocalyptic number.

It is an amenable number.

1251561134252 is an abundant number, since it is smaller than the sum of its proper divisors (1324575057748).

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

1251561134252 is a wasteful number, since it uses less digits than its factorization.

1251561134252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548086 (or 2548084 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

Adding to 1251561134252 its reverse (2524311651521), we get a palindrome (3775872785773).

The spelling of 1251561134252 in words is "one trillion, two hundred fifty-one billion, five hundred sixty-one million, one hundred thirty-four thousand, two hundred fifty-two".