128480121 has 64 divisors (see below), whose sum is σ = 245606400. Its totient is φ = 64411200.

The previous prime is 128480119. The next prime is 128480129. The reversal of 128480121 is 121084821.

It is not a de Polignac number, because 128480121 - 2¹ = 128480119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (128480129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59226 + ... + 61356.

It is an arithmetic number, because the mean of its divisors is an integer number (3837600).

Almost surely, 2^128480121 is an apocalyptic number.

128480121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128480121 is a deficient number, since it is larger than the sum of its proper divisors (117126279).

128480121 is a wasteful number, since it uses less digits than its factorization.

128480121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187 (or 2181 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 128480121 is about 11334.9071897391. The cubic root of 128480121 is about 504.5977530754.

It can be divided in two parts, 128 and 480121, that added together give a square (480249 = 693²).

The spelling of 128480121 in words is "one hundred twenty-eight million, four hundred eighty thousand, one hundred twenty-one".