125646 has 16 divisors (see below), whose sum is σ = 257664. Its totient is φ = 40824.

The previous prime is 125641. The next prime is 125651. The reversal of 125646 is 646521.

It is an interprime number because it is at equal distance from previous prime (125641) and next prime (125651).

It is a nialpdrome in base 11.

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, 15 + ... + 501.

It is an arithmetic number, because the mean of its divisors is an integer number (16104).

2¹²⁵⁶⁴⁶ is an apocalyptic number.

125646 is an abundant number, since it is smaller than the sum of its proper divisors (132018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125646 is a wasteful number, since it uses less digits than its factorization.

125646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its digits is 1440, while the sum is 24.

The square root of 125646 is about 354.4657952469. The cubic root of 125646 is about 50.0859853789.

The spelling of 125646 in words is "one hundred twenty-five thousand, six hundred forty-six".