125242161 has 16 divisors (see below), whose sum is σ = 182976960. Its totient is φ = 75568320.

The previous prime is 125242147. The next prime is 125242171. The reversal of 125242161 is 161242521.

It is not a de Polignac number, because 125242161 - 2¹⁷ = 125111089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125242141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730 + ... + 15843.

It is an arithmetic number, because the mean of its divisors is an integer number (11436060).

Almost surely, 2^125242161 is an apocalyptic number.

125242161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125242161 is a deficient number, since it is larger than the sum of its proper divisors (57734799).

125242161 is a wasteful number, since it uses less digits than its factorization.

125242161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16816.

The product of its digits is 960, while the sum is 24.

The square root of 125242161 is about 11191.1644166280. The cubic root of 125242161 is about 500.3226730527.

Adding to 125242161 its reverse (161242521), we get a palindrome (286484682).

The spelling of 125242161 in words is "one hundred twenty-five million, two hundred forty-two thousand, one hundred sixty-one".