125915816 has 24 divisors (see below), whose sum is σ = 255652830. Its totient is φ = 58114368.

The previous prime is 125915813. The next prime is 125915833. The reversal of 125915816 is 618519521.

It can be written as a sum of positive squares in 3 ways, for example, as 42120100 + 83795716 = 6490^2 + 9154^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 125915816.

It is not an unprimeable number, because it can be changed into a prime (125915813) 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 5 ways as a sum of consecutive naturals, for example, 45215 + ... + 47918.

Almost surely, 2^125915816 is an apocalyptic number.

It is an amenable number.

125915816 is an abundant number, since it is smaller than the sum of its proper divisors (129737014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125915816 is a wasteful number, since it uses less digits than its factorization.

125915816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93165 (or 93148 counting only the distinct ones).

The product of its digits is 21600, while the sum is 38.

The square root of 125915816 is about 11221.2216803697. The cubic root of 125915816 is about 501.2181179673.

The spelling of 125915816 in words is "one hundred twenty-five million, nine hundred fifteen thousand, eight hundred sixteen".