125681644 has 24 divisors (see below), whose sum is σ = 243323136. Its totient is φ = 56322000.

The previous prime is 125681641. The next prime is 125681669. The reversal of 125681644 is 446186521.

It is not an unprimeable number, because it can be changed into a prime (125681641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16992 + ... + 23239.

It is an arithmetic number, because the mean of its divisors is an integer number (10138464).

Almost surely, 2^125681644 is an apocalyptic number.

It is an amenable number.

125681644 is a deficient number, since it is larger than the sum of its proper divisors (117641492).

125681644 is a wasteful number, since it uses less digits than its factorization.

125681644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40317 (or 40315 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 125681644 is about 11210.7824883012. The cubic root of 125681644 is about 500.9072116053.

The spelling of 125681644 in words is "one hundred twenty-five million, six hundred eighty-one thousand, six hundred forty-four".