126128220 has 24 divisors (see below), whose sum is σ = 353159184. Its totient is φ = 33634176.

The previous prime is 126128209. The next prime is 126128257. The reversal of 126128220 is 22821621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1051009 + ... + 1051128.

It is an arithmetic number, because the mean of its divisors is an integer number (14714966).

Almost surely, 2^126128220 is an apocalyptic number.

126128220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126128220 is an abundant number, since it is smaller than the sum of its proper divisors (227030964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126128220 is a wasteful number, since it uses less digits than its factorization.

126128220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102149 (or 2102147 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 126128220 is about 11230.6820807999. The cubic root of 126128220 is about 501.4997900946.

Adding to 126128220 its reverse (22821621), we get a palindrome (148949841).

The spelling of 126128220 in words is "one hundred twenty-six million, one hundred twenty-eight thousand, two hundred twenty".