125505550 has 12 divisors (see below), whose sum is σ = 233440416. Its totient is φ = 50202200.

The previous prime is 125505547. The next prime is 125505553. The reversal of 125505550 is 55505521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (125505547) and next prime (125505553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125505553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1255006 + ... + 1255105.

It is an arithmetic number, because the mean of its divisors is an integer number (19453368).

Almost surely, 2^125505550 is an apocalyptic number.

125505550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125505550 is a deficient number, since it is larger than the sum of its proper divisors (107934866).

125505550 is a wasteful number, since it uses less digits than its factorization.

125505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510123 (or 2510118 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 125505550 is about 11202.9259570882. The cubic root of 125505550 is about 500.6731599713.

The spelling of 125505550 in words is "one hundred twenty-five million, five hundred five thousand, five hundred fifty".