125730004520 has 128 divisors (see below), whose sum is σ = 289735380000. Its totient is φ = 49093558272.

The previous prime is 125730004457. The next prime is 125730004531. The reversal of 125730004520 is 25400037521.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 8052190756 + 117677813764 = 89734^2 + 343042^2 .

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, 177333926 + ... + 177334634.

Almost surely, 2^125730004520 is an apocalyptic number.

125730004520 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 125730004520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144867690000).

125730004520 is an abundant number, since it is smaller than the sum of its proper divisors (164005375480).

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

125730004520 is a wasteful number, since it uses less digits than its factorization.

125730004520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375 (or 1371 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The spelling of 125730004520 in words is "one hundred twenty-five billion, seven hundred thirty million, four thousand, five hundred twenty".