128042243 has 8 divisors (see below), whose sum is σ = 149320800. Its totient is φ = 109750200.

The previous prime is 128042227. The next prime is 128042267. The reversal of 128042243 is 342240821.

It is not a de Polignac number, because 128042243 - 2⁴ = 128042227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128042203) 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, 186308 + ... + 186993.

It is an arithmetic number, because the mean of its divisors is an integer number (18665100).

Almost surely, 2^128042243 is an apocalyptic number.

128042243 is a deficient number, since it is larger than the sum of its proper divisors (21278557).

128042243 is an frugal number, since it uses more digits than its factorization.

128042243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373322 (or 373308 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 128042243 is about 11315.5752394653. The cubic root of 128042243 is about 504.0238543236.

The spelling of 128042243 in words is "one hundred twenty-eight million, forty-two thousand, two hundred forty-three".