10128661 has 8 divisors (see below), whose sum is σ = 10494464. Its totient is φ = 9765360.

The previous prime is 10128659. The next prime is 10128673. The reversal of 10128661 is 16682101.

10128661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10128661 - 2¹ = 10128659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10128161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11896 + ... + 12718.

It is an arithmetic number, because the mean of its divisors is an integer number (1311808).

Almost surely, 2^10128661 is an apocalyptic number.

It is an amenable number.

10128661 is a deficient number, since it is larger than the sum of its proper divisors (365803).

10128661 is an equidigital number, since it uses as much as digits as its factorization.

10128661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 10128661 is about 3182.5557339974. Note that the first 3 decimals coincide. The cubic root of 10128661 is about 216.3635068519.

The spelling of 10128661 in words is "ten million, one hundred twenty-eight thousand, six hundred sixty-one".