125503506 has 40 divisors (see below), whose sum is σ = 282965760. Its totient is φ = 41575032.

The previous prime is 125503481. The next prime is 125503513. The reversal of 125503506 is 605305521.

It is a super-2 number, since 2×125503506² = 31502260036584072, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 125503506.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24735 + ... + 29373.

It is an arithmetic number, because the mean of its divisors is an integer number (7074144).

Almost surely, 2^125503506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125503506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141482880).

125503506 is an abundant number, since it is smaller than the sum of its proper divisors (157462254).

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

125503506 is a wasteful number, since it uses less digits than its factorization.

125503506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820 (or 4811 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 125503506 is about 11202.8347305492. The cubic root of 125503506 is about 500.6704419467.

The spelling of 125503506 in words is "one hundred twenty-five million, five hundred three thousand, five hundred six".