10128947 has 4 divisors (see below), whose sum is σ = 10569360. Its totient is φ = 9688536.

The previous prime is 10128913. The next prime is 10128949. The reversal of 10128947 is 74982101.

10128947 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74982101 = 157 ⋅477593.

It is a cyclic number.

It is not a de Polignac number, because 10128947 - 2¹⁶ = 10063411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10128949) 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, 220172 + ... + 220217.

It is an arithmetic number, because the mean of its divisors is an integer number (2642340).

Almost surely, 2^10128947 is an apocalyptic number.

10128947 is a deficient number, since it is larger than the sum of its proper divisors (440413).

10128947 is an equidigital number, since it uses as much as digits as its factorization.

10128947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440412.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 10128947 is about 3182.6006661220. The cubic root of 10128947 is about 216.3655432968.

The spelling of 10128947 in words is "ten million, one hundred twenty-eight thousand, nine hundred forty-seven".