128263243 has 8 divisors (see below), whose sum is σ = 136254800. Its totient is φ = 120395808.

The previous prime is 128263237. The next prime is 128263273. The reversal of 128263243 is 342362821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128263243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128263273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28896 + ... + 33037.

It is an arithmetic number, because the mean of its divisors is an integer number (17031850).

Almost surely, 2^128263243 is an apocalyptic number.

128263243 is a deficient number, since it is larger than the sum of its proper divisors (7991557).

128263243 is a wasteful number, since it uses less digits than its factorization.

128263243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62061.

The product of its digits is 13824, while the sum is 31.

The square root of 128263243 is about 11325.3363305467. The cubic root of 128263243 is about 504.3136681769.

The spelling of 128263243 in words is "one hundred twenty-eight million, two hundred sixty-three thousand, two hundred forty-three".