128654 has 4 divisors (see below), whose sum is σ = 192984. Its totient is φ = 64326.

The previous prime is 128629. The next prime is 128657. The reversal of 128654 is 456821.

128654 is nontrivially palindromic in base 6.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128654.

It is not an unprimeable number, because it can be changed into a prime (128657) 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 as a sum of consecutive naturals, namely, 32162 + ... + 32165.

It is an arithmetic number, because the mean of its divisors is an integer number (48246).

2¹²⁸⁶⁵⁴ is an apocalyptic number.

128654 is a deficient number, since it is larger than the sum of its proper divisors (64330).

128654 is an equidigital number, since it uses as much as digits as its factorization.

128654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64329.

The product of its digits is 1920, while the sum is 26.

The square root of 128654 is about 358.6837046759. The cubic root of 128654 is about 50.4825283480.

The spelling of 128654 in words is "one hundred twenty-eight thousand, six hundred fifty-four".