125555505 has 24 divisors (see below), whose sum is σ = 210016128. Its totient is φ = 64047456.

The previous prime is 125555501. The next prime is 125555519. The reversal of 125555505 is 505555521.

It is not a de Polignac number, because 125555505 - 2² = 125555501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125555501) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 24 + ... + 15846.

It is an arithmetic number, because the mean of its divisors is an integer number (8750672).

Almost surely, 2^125555505 is an apocalyptic number.

125555505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125555505 is a deficient number, since it is larger than the sum of its proper divisors (84460623).

125555505 is a wasteful number, since it uses less digits than its factorization.

125555505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15877 (or 15854 counting only the distinct ones).

The product of its (nonzero) digits is 31250, while the sum is 33.

The square root of 125555505 is about 11205.1552867419. The cubic root of 125555505 is about 500.7395788402.

The spelling of 125555505 in words is "one hundred twenty-five million, five hundred fifty-five thousand, five hundred five".