128123158 has 8 divisors (see below), whose sum is σ = 192791952. Its totient is φ = 63859176.

The previous prime is 128123153. The next prime is 128123167. The reversal of 128123158 is 851321821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128123153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100410 + ... + 101677.

It is an arithmetic number, because the mean of its divisors is an integer number (24098994).

Almost surely, 2^128123158 is an apocalyptic number.

128123158 is a deficient number, since it is larger than the sum of its proper divisors (64668794).

128123158 is a wasteful number, since it uses less digits than its factorization.

128123158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202406.

The product of its digits is 3840, while the sum is 31.

The square root of 128123158 is about 11319.1500564309. The cubic root of 128123158 is about 504.1300028920.

Adding to 128123158 its reverse (851321821), we get a palindrome (979444979).

The spelling of 128123158 in words is "one hundred twenty-eight million, one hundred twenty-three thousand, one hundred fifty-eight".