126720684 has 72 divisors (see below), whose sum is σ = 332666880. Its totient is φ = 40629600.

The previous prime is 126720679. The next prime is 126720701. The reversal of 126720684 is 486027621.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 302227 + ... + 302645.

Almost surely, 2^126720684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126720684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166333440).

126720684 is an abundant number, since it is smaller than the sum of its proper divisors (205946196).

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

126720684 is a wasteful number, since it uses less digits than its factorization.

126720684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 126720684 is about 11257.0282046373. The cubic root of 126720684 is about 502.2837979846.

The spelling of 126720684 in words is "one hundred twenty-six million, seven hundred twenty thousand, six hundred eighty-four".