125551165 has 8 divisors (see below), whose sum is σ = 150724440. Its totient is φ = 100398912.

The previous prime is 125551163. The next prime is 125551201. The reversal of 125551165 is 561155521.

It can be written as a sum of positive squares in 4 ways, for example, as 29138404 + 96412761 = 5398^2 + 9819^2 .

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 125551165 - 2¹ = 125551163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125551163) 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 7 ways as a sum of consecutive naturals, for example, 14971 + ... + 21799.

It is an arithmetic number, because the mean of its divisors is an integer number (18840555).

Almost surely, 2^125551165 is an apocalyptic number.

It is an amenable number.

125551165 is a deficient number, since it is larger than the sum of its proper divisors (25173275).

125551165 is an equidigital number, since it uses as much as digits as its factorization.

125551165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511.

The product of its digits is 7500, while the sum is 31.

The square root of 125551165 is about 11204.9616242092. The cubic root of 125551165 is about 500.7338091880.

The spelling of 125551165 in words is "one hundred twenty-five million, five hundred fifty-one thousand, one hundred sixty-five".