125512587751 has 4 divisors (see below), whose sum is σ = 125513690104. Its totient is φ = 125511485400.

The previous prime is 125512587731. The next prime is 125512587791. The reversal of 125512587751 is 157785215521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 125512587751 - 2⁷ = 125512587623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125512587695 and 125512587704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125512587721) 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 3 ways as a sum of consecutive naturals, for example, 357765 + ... + 615646.

It is an arithmetic number, because the mean of its divisors is an integer number (31378422526).

Almost surely, 2^125512587751 is an apocalyptic number.

125512587751 is a deficient number, since it is larger than the sum of its proper divisors (1102353).

125512587751 is an equidigital number, since it uses as much as digits as its factorization.

125512587751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102352.

The product of its digits is 980000, while the sum is 49.

The spelling of 125512587751 in words is "one hundred twenty-five billion, five hundred twelve million, five hundred eighty-seven thousand, seven hundred fifty-one".