125500550 has 24 divisors (see below), whose sum is σ = 266779056. Its totient is φ = 43028640.

The previous prime is 125500547. The next prime is 125500577. The reversal of 125500550 is 55005521.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 178937 + ... + 179636.

It is an arithmetic number, because the mean of its divisors is an integer number (11115794).

Almost surely, 2^125500550 is an apocalyptic number.

125500550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125500550 is an abundant number, since it is smaller than the sum of its proper divisors (141278506).

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

125500550 is a wasteful number, since it uses less digits than its factorization.

125500550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358592 (or 358587 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 125500550 is about 11202.7027988785. The cubic root of 125500550 is about 500.6665111310. Note that the first 3 decimals are identical.

The spelling of 125500550 in words is "one hundred twenty-five million, five hundred thousand, five hundred fifty".