125605 has 4 divisors (see below), whose sum is σ = 150732. Its totient is φ = 100480.

The previous prime is 125597. The next prime is 125617. The reversal of 125605 is 506521.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51076 + 74529 = 226^2 + 273^2 .

It is not a de Polignac number, because 125605 - 2³ = 125597 is a prime.

It is a Duffinian number.

125605 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12556 + ... + 12565.

It is an arithmetic number, because the mean of its divisors is an integer number (37683).

2¹²⁵⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

125605 is a deficient number, since it is larger than the sum of its proper divisors (25127).

125605 is an equidigital number, since it uses as much as digits as its factorization.

125605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25126.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 125605 is about 354.4079570213. The cubic root of 125605 is about 50.0805368733.

It can be divided in two parts, 125 and 605, that multiplied together give a square (75625 = 275²).

The spelling of 125605 in words is "one hundred twenty-five thousand, six hundred five".