125721882 has 144 divisors (see below), whose sum is σ = 337270752. Its totient is φ = 34642080.

The previous prime is 125721857. The next prime is 125721889. The reversal of 125721882 is 288127521.

125721882 is a `hidden beast` number, since 1 + 2 + 572 + 1 + 8 + 82 = 666.

It is a super-2 number, since 2×125721882² = 31611983227243848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125721889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1876413 + ... + 1876479.

It is an arithmetic number, because the mean of its divisors is an integer number (2342158).

Almost surely, 2^125721882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125721882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168635376).

125721882 is an abundant number, since it is smaller than the sum of its proper divisors (211548870).

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

125721882 is an equidigital number, since it uses as much as digits as its factorization.

125721882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 96 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 125721882 is about 11212.5769562576. The cubic root of 125721882 is about 500.9606624067.

The spelling of 125721882 in words is "one hundred twenty-five million, seven hundred twenty-one thousand, eight hundred eighty-two".