125705520 has 200 divisors, whose sum is σ = 460022640. Its totient is φ = 31726080.

The previous prime is 125705519. The next prime is 125705521. The reversal of 125705520 is 25507521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (125705519) and next prime (125705521).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125705521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 122610 + ... + 123630.

Almost surely, 2^125705520 is an apocalyptic number.

125705520 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 125705520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230011320).

125705520 is an abundant number, since it is smaller than the sum of its proper divisors (334317120).

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

125705520 is a wasteful number, since it uses less digits than its factorization.

125705520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 125705520 is about 11211.8473054176. The cubic root of 125705520 is about 500.9389290541.

The spelling of 125705520 in words is "one hundred twenty-five million, seven hundred five thousand, five hundred twenty".