128677481 has 12 divisors (see below), whose sum is σ = 138111120. Its totient is φ = 119555280.

The previous prime is 128677463. The next prime is 128677499. The reversal of 128677481 is 184776821.

It is an interprime number because it is at equal distance from previous prime (128677463) and next prime (128677499).

It is not a de Polignac number, because 128677481 - 2¹⁴ = 128661097 is a prime.

It is a super-2 number, since 2×128677481² = 33115788233010722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128677411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52166 + ... + 54576.

It is an arithmetic number, because the mean of its divisors is an integer number (11509260).

Almost surely, 2^128677481 is an apocalyptic number.

It is an amenable number.

128677481 is a deficient number, since it is larger than the sum of its proper divisors (9433639).

128677481 is an equidigital number, since it uses as much as digits as its factorization.

128677481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536 (or 2483 counting only the distinct ones).

The product of its digits is 150528, while the sum is 44.

The square root of 128677481 is about 11343.6096988569. The cubic root of 128677481 is about 504.8559939683.

The spelling of 128677481 in words is "one hundred twenty-eight million, six hundred seventy-seven thousand, four hundred eighty-one".