125181720 has 128 divisors (see below), whose sum is σ = 430848000. Its totient is φ = 32296320.

The previous prime is 125181713. The next prime is 125181731. The reversal of 125181720 is 27181521.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31611 + ... + 35349.

It is an arithmetic number, because the mean of its divisors is an integer number (3366000).

Almost surely, 2^125181720 is an apocalyptic number.

125181720 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 125181720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215424000).

125181720 is an abundant number, since it is smaller than the sum of its proper divisors (305666280).

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

125181720 is a wasteful number, since it uses less digits than its factorization.

125181720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790 (or 3780 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 125181720 is about 11188.4637015097. The cubic root of 125181720 is about 500.2421760160.

The spelling of 125181720 in words is "one hundred twenty-five million, one hundred eighty-one thousand, seven hundred twenty".