125811161 has 8 divisors (see below), whose sum is σ = 143976384. Its totient is φ = 107694000.

The previous prime is 125811157. The next prime is 125811167. The reversal of 125811161 is 161118521.

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 125811161 - 2² = 125811157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125811161.

It is not an unprimeable number, because it can be changed into a prime (125811167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6215 + ... + 17036.

It is an arithmetic number, because the mean of its divisors is an integer number (17997048).

Almost surely, 2^125811161 is an apocalyptic number.

It is an amenable number.

125811161 is a deficient number, since it is larger than the sum of its proper divisors (18165223).

125811161 is an equidigital number, since it uses as much as digits as its factorization.

125811161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24031.

The product of its digits is 480, while the sum is 26.

The square root of 125811161 is about 11216.5574487006. The cubic root of 125811161 is about 501.0792169058.

Adding to 125811161 its reverse (161118521), we get a palindrome (286929682).

The spelling of 125811161 in words is "one hundred twenty-five million, eight hundred eleven thousand, one hundred sixty-one".