128121059 has 8 divisors (see below), whose sum is σ = 141683952. Its totient is φ = 114877440.

The previous prime is 128121053. The next prime is 128121073. The reversal of 128121059 is 950121821.

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 128121059 - 2¹⁶ = 128055523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128121053) 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, 78974 + ... + 80579.

It is an arithmetic number, because the mean of its divisors is an integer number (17710494).

Almost surely, 2^128121059 is an apocalyptic number.

128121059 is a deficient number, since it is larger than the sum of its proper divisors (13562893).

128121059 is a wasteful number, since it uses less digits than its factorization.

128121059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159637.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 128121059 is about 11319.0573370754. The cubic root of 128121059 is about 504.1272498777.

The spelling of 128121059 in words is "one hundred twenty-eight million, one hundred twenty-one thousand, fifty-nine".