128911126 has 4 divisors (see below), whose sum is σ = 193366692. Its totient is φ = 64455562.

The previous prime is 128911121. The next prime is 128911127. The reversal of 128911126 is 621119821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128911121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32227780 + ... + 32227783.

It is an arithmetic number, because the mean of its divisors is an integer number (48341673).

Almost surely, 2^128911126 is an apocalyptic number.

128911126 is a deficient number, since it is larger than the sum of its proper divisors (64455566).

128911126 is an equidigital number, since it uses as much as digits as its factorization.

128911126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64455565.

The product of its digits is 1728, while the sum is 31.

The square root of 128911126 is about 11353.9035578078. The cubic root of 128911126 is about 505.1613718183.

The spelling of 128911126 in words is "one hundred twenty-eight million, nine hundred eleven thousand, one hundred twenty-six".