128459481 has 4 divisors (see below), whose sum is σ = 171279312. Its totient is φ = 85639652.

The previous prime is 128459477. The next prime is 128459503. The reversal of 128459481 is 184954821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128459481 - 2² = 128459477 is a prime.

It is a super-2 number, since 2×128459481² = 33003676517578722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128459411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21409911 + ... + 21409916.

It is an arithmetic number, because the mean of its divisors is an integer number (42819828).

Almost surely, 2^128459481 is an apocalyptic number.

It is an amenable number.

128459481 is a deficient number, since it is larger than the sum of its proper divisors (42819831).

128459481 is an equidigital number, since it uses as much as digits as its factorization.

128459481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42819830.

The product of its digits is 92160, while the sum is 42.

The square root of 128459481 is about 11333.9966913706. The cubic root of 128459481 is about 504.5707308526.

The spelling of 128459481 in words is "one hundred twenty-eight million, four hundred fifty-nine thousand, four hundred eighty-one".