126643 has 8 divisors (see below), whose sum is σ = 143280. Its totient is φ = 110880.

The previous prime is 126641. The next prime is 126653. The reversal of 126643 is 346621.

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

It is not a de Polignac number, because 126643 - 2¹ = 126641 is a prime.

It is a Duffinian number.

126643 is a lucky number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (126641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121 + ... + 517.

It is an arithmetic number, because the mean of its divisors is an integer number (17910).

2¹²⁶⁶⁴³ is an apocalyptic number.

126643 is a deficient number, since it is larger than the sum of its proper divisors (16637).

126643 is a wasteful number, since it uses less digits than its factorization.

126643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437.

The product of its digits is 864, while the sum is 22.

The square root of 126643 is about 355.8693580515. The cubic root of 126643 is about 50.2181138105.

Subtracting from 126643 its sum of digits (22), we obtain a palindrome (126621).

It can be divided in two parts, 126 and 643, that multiplied together give a palindrome (81018).

The spelling of 126643 in words is "one hundred twenty-six thousand, six hundred forty-three".