125366161 has 4 divisors (see below), whose sum is σ = 131964400. Its totient is φ = 118767924.

The previous prime is 125366117. The next prime is 125366167. The reversal of 125366161 is 161663521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161663521 = 71 ⋅2276951.

It is a cyclic number.

It is not a de Polignac number, because 125366161 - 2⁹ = 125365649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125366167) 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 3 ways as a sum of consecutive naturals, for example, 3299091 + ... + 3299128.

It is an arithmetic number, because the mean of its divisors is an integer number (32991100).

Almost surely, 2^125366161 is an apocalyptic number.

It is an amenable number.

125366161 is a deficient number, since it is larger than the sum of its proper divisors (6598239).

125366161 is an equidigital number, since it uses as much as digits as its factorization.

125366161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6598238.

The product of its digits is 6480, while the sum is 31.

The square root of 125366161 is about 11196.7031308328. The cubic root of 125366161 is about 500.4877387338.

The spelling of 125366161 in words is "one hundred twenty-five million, three hundred sixty-six thousand, one hundred sixty-one".