125638680 has 64 divisors (see below), whose sum is σ = 387116640. Its totient is φ = 32596992.

The previous prime is 125638657. The next prime is 125638703. The reversal of 125638680 is 86836521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (125638657) and next prime (125638703).

It is a congruent number.

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, 9709 + ... + 18588.

Almost surely, 2^125638680 is an apocalyptic number.

125638680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125638680 is an abundant number, since it is smaller than the sum of its proper divisors (261477960).

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

125638680 is a wasteful number, since it uses less digits than its factorization.

125638680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28348 (or 28344 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 125638680 is about 11208.8661335570. The cubic root of 125638680 is about 500.8501270820.

The spelling of 125638680 in words is "one hundred twenty-five million, six hundred thirty-eight thousand, six hundred eighty".