1251250000125 has 16 divisors (see below), whose sum is σ = 2082080000832. Its totient is φ = 667333333200.

The previous prime is 1251250000123. The next prime is 1251250000129. The reversal of 1251250000125 is 5210000521521.

It is not a de Polignac number, because 1251250000125 - 2¹ = 1251250000123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1251250000095 and 1251250000104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251250000123) 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, 1668332959 + ... + 1668333708.

It is an arithmetic number, because the mean of its divisors is an integer number (130130000052).

Almost surely, 2^{1251250000125} is an apocalyptic number.

1251250000125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1251250000125 is a deficient number, since it is larger than the sum of its proper divisors (830830000707).

1251250000125 is an equidigital number, since it uses as much as digits as its factorization.

1251250000125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336666685 (or 3336666675 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 1251250000125 its reverse (5210000521521), we get a palindrome (6461250521646).

The spelling of 1251250000125 in words is "one trillion, two hundred fifty-one billion, two hundred fifty million, one hundred twenty-five", and thus it is an aban number.