125553555 has 48 divisors (see below), whose sum is σ = 225628416. Its totient is φ = 64546560.

The previous prime is 125553553. The next prime is 125553563. The reversal of 125553555 is 555355521.

125553555 is a `hidden beast` number, since 1 + 2 + 55 + 53 + 555 = 666.

It is not a de Polignac number, because 125553555 - 2¹ = 125553553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125553553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145054 + ... + 145916.

It is an arithmetic number, because the mean of its divisors is an integer number (4700592).

Almost surely, 2^125553555 is an apocalyptic number.

125553555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125553555 is a deficient number, since it is larger than the sum of its proper divisors (100074861).

125553555 is a wasteful number, since it uses less digits than its factorization.

125553555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 985 counting only the distinct ones).

The product of its digits is 93750, while the sum is 36.

The square root of 125553555 is about 11205.0682728844. The cubic root of 125553555 is about 500.7369865014.

It can be divided in two parts, 12555 and 3555, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 125553555 in words is "one hundred twenty-five million, five hundred fifty-three thousand, five hundred fifty-five".