125511125 has 8 divisors (see below), whose sum is σ = 156638040. Its totient is φ = 100408800.

The previous prime is 125511121. The next prime is 125511151. The reversal of 125511125 is 521115521.

It can be written as a sum of positive squares in 4 ways, for example, as 39262756 + 86248369 = 6266^2 + 9287^2 .

It is not a de Polignac number, because 125511125 - 2² = 125511121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125511125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125511121) 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, 501920 + ... + 502169.

It is an arithmetic number, because the mean of its divisors is an integer number (19579755).

Almost surely, 2^125511125 is an apocalyptic number.

It is an amenable number.

125511125 is a deficient number, since it is larger than the sum of its proper divisors (31126915).

125511125 is an equidigital number, since it uses as much as digits as its factorization.

125511125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004104 (or 1004094 counting only the distinct ones).

The product of its digits is 500, while the sum is 23.

The square root of 125511125 is about 11203.1747732507. The cubic root of 125511125 is about 500.6805732199.

Adding to 125511125 its reverse (521115521), we get a palindrome (646626646).

The spelling of 125511125 in words is "one hundred twenty-five million, five hundred eleven thousand, one hundred twenty-five".