125868138841 has 3 divisors (see below), whose sum is σ = 125868493621. Its totient is φ = 125867784062.

The previous prime is 125868138769. The next prime is 125868138859. The reversal of 125868138841 is 148831868521.

The square root of 125868138841 is 354779.

It is a perfect power (a square), and thus also a powerful number.

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 not a de Polignac number, because 125868138841 - 2⁷ = 125868138713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125868138041) 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 2 ways as a sum of consecutive naturals, for example, 177390 + ... + 532168.

Almost surely, 2^125868138841 is an apocalyptic number.

125868138841 is the 354779-th square number.

125868138841 is the 177390-th centered octagonal number.

It is an amenable number.

125868138841 is a deficient number, since it is larger than the sum of its proper divisors (354780).

125868138841 is an frugal number, since it uses more digits than its factorization.

125868138841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709558 (or 354779 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 55.

The spelling of 125868138841 in words is "one hundred twenty-five billion, eight hundred sixty-eight million, one hundred thirty-eight thousand, eight hundred forty-one".