126724780 has 144 divisors (see below), whose sum is σ = 345885120. Its totient is φ = 38723328.

The previous prime is 126724757. The next prime is 126724799. The reversal of 126724780 is 87427621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4369806 + ... + 4369834.

It is an arithmetic number, because the mean of its divisors is an integer number (2401980).

Almost surely, 2^126724780 is an apocalyptic number.

126724780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126724780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172942560).

126724780 is an abundant number, since it is smaller than the sum of its proper divisors (219160340).

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

126724780 is an equidigital number, since it uses as much as digits as its factorization.

126724780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 126724780 is about 11257.2101339541. The cubic root of 126724780 is about 502.2892097091.

The spelling of 126724780 in words is "one hundred twenty-six million, seven hundred twenty-four thousand, seven hundred eighty".