125642655 has 24 divisors (see below), whose sum is σ = 223095600. Its totient is φ = 65374080.

The previous prime is 125642653. The next prime is 125642707. The reversal of 125642655 is 556246521.

125642655 is a `hidden beast` number, since 1 + 2 + 5 + 642 + 6 + 5 + 5 = 666.

It is not a de Polignac number, because 125642655 - 2¹ = 125642653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125642651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32205 + ... + 35894.

It is an arithmetic number, because the mean of its divisors is an integer number (9295650).

Almost surely, 2^125642655 is an apocalyptic number.

125642655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125642655 is a deficient number, since it is larger than the sum of its proper divisors (97452945).

125642655 is a wasteful number, since it uses less digits than its factorization.

125642655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68151 (or 68148 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 125642655 is about 11209.0434471457. The cubic root of 125642655 is about 500.8554090495.

The spelling of 125642655 in words is "one hundred twenty-five million, six hundred forty-two thousand, six hundred fifty-five".