125669 has 2 divisors, whose sum is σ = 125670. Its totient is φ = 125668.

The previous prime is 125659. The next prime is 125683. The reversal of 125669 is 966521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113569 + 12100 = 337^2 + 110^2 .

It is an emirp because it is prime and its reverse (966521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125669 - 2¹⁶ = 60133 is a prime.

It is a super-2 number, since 2×125669² = 31585395122, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125639) 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 as a sum of consecutive naturals, namely, 62834 + 62835.

It is an arithmetic number, because the mean of its divisors is an integer number (62835).

2¹²⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

125669 is a deficient number, since it is larger than the sum of its proper divisors (1).

125669 is an equidigital number, since it uses as much as digits as its factorization.

125669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 125669 is about 354.4982369491. The cubic root of 125669 is about 50.0890413387.

The spelling of 125669 in words is "one hundred twenty-five thousand, six hundred sixty-nine".