128672 has 12 divisors (see below), whose sum is σ = 253386. Its totient is φ = 64320.

The previous prime is 128669. The next prime is 128677. The reversal of 128672 is 276821.

It can be written as a sum of positive squares in only one way, i.e., 126736 + 1936 = 356^2 + 44^2 .

It is not an unprimeable number, because it can be changed into a prime (128677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979 + ... + 2042.

2¹²⁸⁶⁷² is an apocalyptic number.

It is an amenable number.

128672 is a deficient number, since it is larger than the sum of its proper divisors (124714).

128672 is an equidigital number, since it uses as much as digits as its factorization.

128672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031 (or 4023 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 128672 is about 358.7087955431. The cubic root of 128672 is about 50.4848825775.

The spelling of 128672 in words is "one hundred twenty-eight thousand, six hundred seventy-two".