126671 has 4 divisors (see below), whose sum is σ = 127512. Its totient is φ = 125832.

The previous prime is 126653. The next prime is 126683. The reversal of 126671 is 176621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 176621 = 239 ⋅739.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 126671.

It is not an unprimeable number, because it can be changed into a prime (126601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125 + ... + 518.

It is an arithmetic number, because the mean of its divisors is an integer number (31878).

2¹²⁶⁶⁷¹ is an apocalyptic number.

126671 is a deficient number, since it is larger than the sum of its proper divisors (841).

126671 is an equidigital number, since it uses as much as digits as its factorization.

126671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840.

The product of its digits is 504, while the sum is 23.

The square root of 126671 is about 355.9086961568. The cubic root of 126671 is about 50.2218145113.

It can be divided in two parts, 126 and 671, that added together give a palindrome (797).

The spelling of 126671 in words is "one hundred twenty-six thousand, six hundred seventy-one".