125681730 has 32 divisors (see below), whose sum is σ = 302097600. Its totient is φ = 33463872.

The previous prime is 125681723. The next prime is 125681747. The reversal of 125681730 is 37186521.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 125681691 and 125681700.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19336 + ... + 25004.

It is an arithmetic number, because the mean of its divisors is an integer number (9440550).

Almost surely, 2^125681730 is an apocalyptic number.

125681730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125681730 is an abundant number, since it is smaller than the sum of its proper divisors (176415870).

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

125681730 is a wasteful number, since it uses less digits than its factorization.

125681730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6418.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 125681730 is about 11210.7863238936. The cubic root of 125681730 is about 500.9073258570.

The spelling of 125681730 in words is "one hundred twenty-five million, six hundred eighty-one thousand, seven hundred thirty".