128466161 has 16 divisors (see below), whose sum is σ = 140389200. Its totient is φ = 117073920.

The previous prime is 128466137. The next prime is 128466199. The reversal of 128466161 is 161664821.

It can be written as a sum of positive squares in 8 ways, for example, as 6031936 + 122434225 = 2456^2 + 11065^2 .

It is a cyclic number.

It is not a de Polignac number, because 128466161 - 2⁶ = 128466097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128466101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103235 + ... + 104471.

It is an arithmetic number, because the mean of its divisors is an integer number (8774325).

Almost surely, 2^128466161 is an apocalyptic number.

It is an amenable number.

128466161 is a deficient number, since it is larger than the sum of its proper divisors (11923039).

128466161 is a wasteful number, since it uses less digits than its factorization.

128466161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444.

The product of its digits is 13824, while the sum is 35.

The square root of 128466161 is about 11334.2913761735. The cubic root of 128466161 is about 504.5794767337.

The spelling of 128466161 in words is "one hundred twenty-eight million, four hundred sixty-six thousand, one hundred sixty-one".