128451081 has 8 divisors (see below), whose sum is σ = 186837984. Its totient is φ = 77849120.

The previous prime is 128451079. The next prime is 128451091. The reversal of 128451081 is 180154821.

It is a happy number.

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 128451081 - 2¹ = 128451079 is a prime.

It is a super-2 number, since 2×128451081² = 32999360420137122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128451091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946196 + ... + 1946261.

It is an arithmetic number, because the mean of its divisors is an integer number (23354748).

Almost surely, 2^128451081 is an apocalyptic number.

128451081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128451081 is a deficient number, since it is larger than the sum of its proper divisors (58386903).

128451081 is a wasteful number, since it uses less digits than its factorization.

128451081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892471.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 128451081 is about 11333.6261187671. The cubic root of 128451081 is about 504.5597326076.

The spelling of 128451081 in words is "one hundred twenty-eight million, four hundred fifty-one thousand, eighty-one".