125405655 has 8 divisors (see below), whose sum is σ = 200649072. Its totient is φ = 66883008.

The previous prime is 125405653. The next prime is 125405671. The reversal of 125405655 is 556504521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125405655 - 2¹ = 125405653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125405653) 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 7 ways as a sum of consecutive naturals, for example, 4180174 + ... + 4180203.

It is an arithmetic number, because the mean of its divisors is an integer number (25081134).

Almost surely, 2^125405655 is an apocalyptic number.

125405655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125405655 is a deficient number, since it is larger than the sum of its proper divisors (75243417).

125405655 is an equidigital number, since it uses as much as digits as its factorization.

125405655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8360385.

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 125405655 is about 11198.4666361069. The cubic root of 125405655 is about 500.5402892980.

The spelling of 125405655 in words is "one hundred twenty-five million, four hundred five thousand, six hundred fifty-five".