125250621671 has 4 divisors (see below), whose sum is σ = 143143567632. Its totient is φ = 107357675712.

The previous prime is 125250621641. The next prime is 125250621679. The reversal of 125250621671 is 176126052521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176126052521 = 1231 ⋅143075591.

It is not a de Polignac number, because 125250621671 - 2²⁶ = 125183512807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125250621679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8946472970 + ... + 8946472983.

It is an arithmetic number, because the mean of its divisors is an integer number (35785891908).

Almost surely, 2^125250621671 is an apocalyptic number.

125250621671 is a deficient number, since it is larger than the sum of its proper divisors (17892945961).

125250621671 is an equidigital number, since it uses as much as digits as its factorization.

125250621671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17892945960.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 125250621671 in words is "one hundred twenty-five billion, two hundred fifty million, six hundred twenty-one thousand, six hundred seventy-one".