126669 has 4 divisors (see below), whose sum is σ = 168896. Its totient is φ = 84444.

The previous prime is 126653. The next prime is 126683. The reversal of 126669 is 966621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 126669 - 2⁴ = 126653 is a prime.

It is a super-2 number, since 2×126669² = 32090071122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21109 + ... + 21114.

It is an arithmetic number, because the mean of its divisors is an integer number (42224).

2¹²⁶⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

126669 is a deficient number, since it is larger than the sum of its proper divisors (42227).

126669 is an equidigital number, since it uses as much as digits as its factorization.

126669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42226.

The product of its digits is 3888, while the sum is 30.

The square root of 126669 is about 355.9058864363. The cubic root of 126669 is about 50.2215501936.

The spelling of 126669 in words is "one hundred twenty-six thousand, six hundred sixty-nine".