126642 has 8 divisors (see below), whose sum is σ = 253296. Its totient is φ = 42212.

The previous prime is 126641. The next prime is 126653. The reversal of 126642 is 246621.

It is a happy number.

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

126642 is an admirable 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10548 + ... + 10559.

It is an arithmetic number, because the mean of its divisors is an integer number (31662).

2¹²⁶⁶⁴² is an apocalyptic number.

126642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

126642 is a wasteful number, since it uses less digits than its factorization.

126642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21112.

The product of its digits is 576, while the sum is 21.

The square root of 126642 is about 355.8679530388. The cubic root of 126642 is about 50.2179816325.

Subtracting from 126642 its sum of digits (21), we obtain a palindrome (126621).

The spelling of 126642 in words is "one hundred twenty-six thousand, six hundred forty-two".