125816163 has 12 divisors (see below), whose sum is σ = 184392264. Its totient is φ = 76252000.

The previous prime is 125816161. The next prime is 125816191. The reversal of 125816163 is 361618521.

It is not a de Polignac number, because 125816163 - 2¹ = 125816161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (125816161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172938 + ... + 173663.

It is an arithmetic number, because the mean of its divisors is an integer number (15366022).

Almost surely, 2^125816163 is an apocalyptic number.

125816163 is a deficient number, since it is larger than the sum of its proper divisors (58576101).

125816163 is a wasteful number, since it uses less digits than its factorization.

125816163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346626 (or 346615 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 125816163 is about 11216.7804204237. The cubic root of 125816163 is about 501.0858574534.

The spelling of 125816163 in words is "one hundred twenty-five million, eight hundred sixteen thousand, one hundred sixty-three".