1251530211040 has 48 divisors (see below), whose sum is σ = 2959896017232. Its totient is φ = 500077753344.

The previous prime is 1251530210981. The next prime is 1251530211047. The reversal of 1251530211040 is 401120351521.

It is a junction number, because it is equal to n+sod(n) for n = 1251530210996 and 1251530211014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251530211047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4024074 + ... + 4323913.

It is an arithmetic number, because the mean of its divisors is an integer number (61664500359).

Almost surely, 2^{1251530211040} is an apocalyptic number.

1251530211040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251530211040 is an abundant number, since it is smaller than the sum of its proper divisors (1708365806192).

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

1251530211040 is an equidigital number, since it uses as much as digits as its factorization.

1251530211040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8348939 (or 8348931 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 1251530211040 its reverse (401120351521), we get a palindrome (1652650562561).

The spelling of 1251530211040 in words is "one trillion, two hundred fifty-one billion, five hundred thirty million, two hundred eleven thousand, forty".