128067121 has 16 divisors (see below), whose sum is σ = 160211968. Its totient is φ = 99662400.

The previous prime is 128067113. The next prime is 128067131. The reversal of 128067121 is 121760821.

It is a cyclic number.

It is not a de Polignac number, because 128067121 - 2³ = 128067113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128067121.

It is not an unprimeable number, because it can be changed into a prime (128067131) 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, 5985 + ... + 17086.

It is an arithmetic number, because the mean of its divisors is an integer number (10013248).

Almost surely, 2^128067121 is an apocalyptic number.

It is an amenable number.

128067121 is a deficient number, since it is larger than the sum of its proper divisors (32144847).

128067121 is a wasteful number, since it uses less digits than its factorization.

128067121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23152.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 128067121 is about 11316.6744673513. The cubic root of 128067121 is about 504.0564953572.

The spelling of 128067121 in words is "one hundred twenty-eight million, sixty-seven thousand, one hundred twenty-one".