128110442 has 4 divisors (see below), whose sum is σ = 192165666. Its totient is φ = 64055220.

The previous prime is 128110439. The next prime is 128110447. The reversal of 128110442 is 244011821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244011821 = 5737 ⋅42533.

It can be written as a sum of positive squares in only one way, i.e., 107143201 + 20967241 = 10351^2 + 4579^2 .

It is not an unprimeable number, because it can be changed into a prime (128110447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32027609 + ... + 32027612.

Almost surely, 2^128110442 is an apocalyptic number.

128110442 is a deficient number, since it is larger than the sum of its proper divisors (64055224).

128110442 is an equidigital number, since it uses as much as digits as its factorization.

128110442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64055223.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 128110442 is about 11318.5883395413. The cubic root of 128110442 is about 504.1133243324.

The spelling of 128110442 in words is "one hundred twenty-eight million, one hundred ten thousand, four hundred forty-two".