125740181587 has 4 divisors (see below), whose sum is σ = 125816994576. Its totient is φ = 125663368600.

The previous prime is 125740181561. The next prime is 125740181603. The reversal of 125740181587 is 785181047521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125740181587 - 2⁷ = 125740181459 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125740181587.

It is not an unprimeable number, because it can be changed into a prime (125740191587) 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, 38404039 + ... + 38407312.

It is an arithmetic number, because the mean of its divisors is an integer number (31454248644).

Almost surely, 2^125740181587 is an apocalyptic number.

125740181587 is a deficient number, since it is larger than the sum of its proper divisors (76812989).

125740181587 is an equidigital number, since it uses as much as digits as its factorization.

125740181587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76812988.

The product of its (nonzero) digits is 627200, while the sum is 49.

The spelling of 125740181587 in words is "one hundred twenty-five billion, seven hundred forty million, one hundred eighty-one thousand, five hundred eighty-seven".