126985128 has 32 divisors (see below), whose sum is σ = 318483360. Its totient is φ = 42192320.

The previous prime is 126985097. The next prime is 126985129. The reversal of 126985128 is 821589621.

It is a happy number.

It is a super-2 number, since 2×126985128² = 32250445466352768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126985128.

It is not an unprimeable number, because it can be changed into a prime (126985129) 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, 738 + ... + 15953.

It is an arithmetic number, because the mean of its divisors is an integer number (9952605).

Almost surely, 2^126985128 is an apocalyptic number.

It is an amenable number.

126985128 is an abundant number, since it is smaller than the sum of its proper divisors (191498232).

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

126985128 is a wasteful number, since it uses less digits than its factorization.

126985128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17017 (or 17013 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 126985128 is about 11268.7678119660. The cubic root of 126985128 is about 502.6329481643.

The spelling of 126985128 in words is "one hundred twenty-six million, nine hundred eighty-five thousand, one hundred twenty-eight".