125847865 has 24 divisors (see below), whose sum is σ = 178774344. Its totient is φ = 84480000.

The previous prime is 125847863. The next prime is 125847871. The reversal of 125847865 is 568748521.

It can be written as a sum of positive squares in 4 ways, for example, as 12467961 + 113379904 = 3531^2 + 10648^2 .

It is not a de Polignac number, because 125847865 - 2¹ = 125847863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125847863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136 + ... + 15865.

It is an arithmetic number, because the mean of its divisors is an integer number (7448931).

Almost surely, 2^125847865 is an apocalyptic number.

It is an amenable number.

125847865 is a deficient number, since it is larger than the sum of its proper divisors (52926479).

125847865 is a wasteful number, since it uses less digits than its factorization.

125847865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16041 (or 16030 counting only the distinct ones).

The product of its digits is 537600, while the sum is 46.

The square root of 125847865 is about 11218.1934820184. The cubic root of 125847865 is about 501.1279402549.

It can be divided in two parts, 12584 and 7865, that added together give a square (20449 = 143²).

The spelling of 125847865 in words is "one hundred twenty-five million, eight hundred forty-seven thousand, eight hundred sixty-five".