125120171 has 12 divisors (see below), whose sum is σ = 138175296. Its totient is φ = 113211120.

The previous prime is 125120167. The next prime is 125120173. The reversal of 125120171 is 171021521.

It is a happy number.

It is not a de Polignac number, because 125120171 - 2² = 125120167 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 (125120173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24665 + ... + 29301.

It is an arithmetic number, because the mean of its divisors is an integer number (11514608).

Almost surely, 2^125120171 is an apocalyptic number.

125120171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125120171 is a deficient number, since it is larger than the sum of its proper divisors (13055125).

125120171 is a wasteful number, since it uses less digits than its factorization.

125120171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4882 (or 4871 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 125120171 is about 11185.7128069694. The cubic root of 125120171 is about 500.1601766814.

Adding to 125120171 its reverse (171021521), we get a palindrome (296141692).

The spelling of 125120171 in words is "one hundred twenty-five million, one hundred twenty thousand, one hundred seventy-one".