125001555312 has 40 divisors (see below), whose sum is σ = 323114605056. Its totient is φ = 41642163136.

The previous prime is 125001555307. The next prime is 125001555317. The reversal of 125001555312 is 213555100521.

It is an interprime number because it is at equal distance from previous prime (125001555307) and next prime (125001555317).

It is a self number, because there is not a number n which added to its sum of digits gives 125001555312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125001555317) 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, 701088 + ... + 861119.

Almost surely, 2^125001555312 is an apocalyptic number.

125001555312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

125001555312 is an abundant number, since it is smaller than the sum of its proper divisors (198113049744).

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

125001555312 is a wasteful number, since it uses less digits than its factorization.

125001555312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563885 (or 1563879 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

Adding to 125001555312 its reverse (213555100521), we get a palindrome (338556655833).

The spelling of 125001555312 in words is "one hundred twenty-five billion, one million, five hundred fifty-five thousand, three hundred twelve".