125913818 has 16 divisors (see below), whose sum is σ = 191889000. Its totient is φ = 61957632.

The previous prime is 125913811. The next prime is 125913839. The reversal of 125913818 is 818319521.

It can be written as a sum of positive squares in 4 ways, for example, as 125596849 + 316969 = 11207^2 + 563^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125913811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39218 + ... + 42306.

Almost surely, 2^125913818 is an apocalyptic number.

125913818 is a deficient number, since it is larger than the sum of its proper divisors (65975182).

125913818 is a wasteful number, since it uses less digits than its factorization.

125913818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409.

The product of its digits is 17280, while the sum is 38.

The square root of 125913818 is about 11221.1326522771. The cubic root of 125913818 is about 501.2154668863.

The spelling of 125913818 in words is "one hundred twenty-five million, nine hundred thirteen thousand, eight hundred eighteen".