125555 has 4 divisors (see below), whose sum is σ = 150672. Its totient is φ = 100440.

The previous prime is 125551. The next prime is 125591. The reversal of 125555 is 555521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 125555 - 2² = 125551 is a prime.

It is a Duffinian number.

125555 is a modest number, since divided by 555 gives 125 as remainder.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 125555.

It is not an unprimeable number, because it can be changed into a prime (125551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12551 + ... + 12560.

It is an arithmetic number, because the mean of its divisors is an integer number (37668).

2¹²⁵⁵⁵⁵ is an apocalyptic number.

125555 is a deficient number, since it is larger than the sum of its proper divisors (25117).

125555 is an equidigital number, since it uses as much as digits as its factorization.

125555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25116.

The product of its digits is 1250, while the sum is 23.

The square root of 125555 is about 354.3374098229. The cubic root of 125555 is about 50.0738907494.

The spelling of 125555 in words is "one hundred twenty-five thousand, five hundred fifty-five".