128612481 has 16 divisors (see below), whose sum is σ = 183778944. Its totient is φ = 79795584.

The previous prime is 128612467. The next prime is 128612489. The reversal of 128612481 is 184216821.

It is not a de Polignac number, because 128612481 - 2¹⁸ = 128350337 is a prime.

It is a super-2 number, since 2×128612481² = 33082340537950722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128612489) 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 15 ways as a sum of consecutive naturals, for example, 22636 + ... + 27741.

It is an arithmetic number, because the mean of its divisors is an integer number (11486184).

Almost surely, 2^128612481 is an apocalyptic number.

It is an amenable number.

128612481 is a deficient number, since it is larger than the sum of its proper divisors (55166463).

128612481 is a wasteful number, since it uses less digits than its factorization.

128612481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50440.

The product of its digits is 6144, while the sum is 33.

The square root of 128612481 is about 11340.7442877441. The cubic root of 128612481 is about 504.7709721852.

The spelling of 128612481 in words is "one hundred twenty-eight million, six hundred twelve thousand, four hundred eighty-one".