128456147 has 4 divisors (see below), whose sum is σ = 128640096. Its totient is φ = 128272200.

The previous prime is 128456137. The next prime is 128456161. The reversal of 128456147 is 741654821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128456147 - 2⁸ = 128455891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128456147.

It is not an unprimeable number, because it can be changed into a prime (128456137) 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, 90923 + ... + 92324.

It is an arithmetic number, because the mean of its divisors is an integer number (32160024).

Almost surely, 2^128456147 is an apocalyptic number.

128456147 is a deficient number, since it is larger than the sum of its proper divisors (183949).

128456147 is an equidigital number, since it uses as much as digits as its factorization.

128456147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183948.

The product of its digits is 53760, while the sum is 38.

The square root of 128456147 is about 11333.8496107898. The cubic root of 128456147 is about 504.5663656541.

The spelling of 128456147 in words is "one hundred twenty-eight million, four hundred fifty-six thousand, one hundred forty-seven".