125640016 has 20 divisors (see below), whose sum is σ = 244081600. Its totient is φ = 62651232.

The previous prime is 125640001. The next prime is 125640017. The reversal of 125640016 is 610046521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125640017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4296 + ... + 16423.

It is an arithmetic number, because the mean of its divisors is an integer number (12204080).

Almost surely, 2^125640016 is an apocalyptic number.

125640016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

125640016 is a deficient number, since it is larger than the sum of its proper divisors (118441584).

125640016 is a wasteful number, since it uses less digits than its factorization.

125640016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21106 (or 21100 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 125640016 is about 11208.9257290786. The cubic root of 125640016 is about 500.8519023670.

Adding to 125640016 its reverse (610046521), we get a palindrome (735686537).

The spelling of 125640016 in words is "one hundred twenty-five million, six hundred forty thousand, sixteen".