128451 has 8 divisors (see below), whose sum is σ = 175104. Its totient is φ = 83720.

The previous prime is 128449. The next prime is 128461. The reversal of 128451 is 154821.

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 128451 - 2¹ = 128449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128411) 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, 315 + ... + 596.

It is an arithmetic number, because the mean of its divisors is an integer number (21888).

2¹²⁸⁴⁵¹ is an apocalyptic number.

128451 is a deficient number, since it is larger than the sum of its proper divisors (46653).

128451 is an equidigital number, since it uses as much as digits as its factorization.

128451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961.

The product of its digits is 320, while the sum is 21.

The square root of 128451 is about 358.4006138388. The cubic root of 128451 is about 50.4559626551.

The spelling of 128451 in words is "one hundred twenty-eight thousand, four hundred fifty-one".