126881720 has 64 divisors (see below), whose sum is σ = 327697920. Its totient is φ = 43311744.

The previous prime is 126881707. The next prime is 126881743. The reversal of 126881720 is 27188621.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 72779 + ... + 74501.

It is an arithmetic number, because the mean of its divisors is an integer number (5120280).

Almost surely, 2^126881720 is an apocalyptic number.

126881720 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 126881720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163848960).

126881720 is an abundant number, since it is smaller than the sum of its proper divisors (200816200).

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

126881720 is a wasteful number, since it uses less digits than its factorization.

126881720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 126881720 is about 11264.1786207428. The cubic root of 126881720 is about 502.4964744850.

The spelling of 126881720 in words is "one hundred twenty-six million, eight hundred eighty-one thousand, seven hundred twenty".