125645 has 8 divisors (see below), whose sum is σ = 162456. Its totient is φ = 92736.

The previous prime is 125641. The next prime is 125651. The reversal of 125645 is 546521.

It can be written as a sum of positive squares in 4 ways, for example, as 5929 + 119716 = 77^2 + 346^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 125645 - 2² = 125641 is a prime.

It is a super-3 number, since 3×125645³ = 5950546958133375, which contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 125645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125641) 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 7 ways as a sum of consecutive naturals, for example, 902 + ... + 1031.

It is an arithmetic number, because the mean of its divisors is an integer number (20307).

2¹²⁵⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

125645 is a deficient number, since it is larger than the sum of its proper divisors (36811).

125645 is a wasteful number, since it uses less digits than its factorization.

125645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951.

The product of its digits is 1200, while the sum is 23.

The square root of 125645 is about 354.4643846707. The cubic root of 125645 is about 50.0858525026.

The spelling of 125645 in words is "one hundred twenty-five thousand, six hundred forty-five".