125561671 has 8 divisors (see below), whose sum is σ = 132984320. Its totient is φ = 118220472.

The previous prime is 125561651. The next prime is 125561699. The reversal of 125561671 is 176165521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125561671 - 2⁷ = 125561543 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 (125561621) 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, 17175 + ... + 23368.

It is an arithmetic number, because the mean of its divisors is an integer number (16623040).

Almost surely, 2^125561671 is an apocalyptic number.

125561671 is a deficient number, since it is larger than the sum of its proper divisors (7422649).

125561671 is a wasteful number, since it uses less digits than its factorization.

125561671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40725.

The product of its digits is 12600, while the sum is 34.

The square root of 125561671 is about 11205.4304245754. The cubic root of 125561671 is about 500.7477757719.

It can be divided in two parts, 1255 and 61671, that added together give a palindrome (62926).

The spelling of 125561671 in words is "one hundred twenty-five million, five hundred sixty-one thousand, six hundred seventy-one".