128126903 has 4 divisors (see below), whose sum is σ = 128599968. Its totient is φ = 127653840.

The previous prime is 128126897. The next prime is 128126939. The reversal of 128126903 is 309621821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309621821 = 1291 ⋅239831.

It is a cyclic number.

It is not a de Polignac number, because 128126903 - 2⁶ = 128126839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128126903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128126983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236126 + ... + 236667.

It is an arithmetic number, because the mean of its divisors is an integer number (32149992).

Almost surely, 2^128126903 is an apocalyptic number.

128126903 is a deficient number, since it is larger than the sum of its proper divisors (473065).

128126903 is an equidigital number, since it uses as much as digits as its factorization.

128126903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473064.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 128126903 is about 11319.3154828373. The cubic root of 128126903 is about 504.1349146985.

The spelling of 128126903 in words is "one hundred twenty-eight million, one hundred twenty-six thousand, nine hundred three".