126813128 has 16 divisors (see below), whose sum is σ = 256065180. Its totient is φ = 58529088.

The previous prime is 126813079. The next prime is 126813151. The reversal of 126813128 is 821318621.

It can be written as a sum of positive squares in 2 ways, for example, as 125933284 + 879844 = 11222^2 + 938^2 .

It is a junction number, because it is equal to n+sod(n) for n = 126813094 and 126813103.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 609575 + ... + 609782.

Almost surely, 2^126813128 is an apocalyptic number.

It is an amenable number.

126813128 is an abundant number, since it is smaller than the sum of its proper divisors (129252052).

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

126813128 is a wasteful number, since it uses less digits than its factorization.

126813128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219376 (or 1219372 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 126813128 is about 11261.1335131060. The cubic root of 126813128 is about 502.4059086388.

The spelling of 126813128 in words is "one hundred twenty-six million, eight hundred thirteen thousand, one hundred twenty-eight".