126842 has 4 divisors (see below), whose sum is σ = 190266. Its totient is φ = 63420.

The previous prime is 126839. The next prime is 126851. The reversal of 126842 is 248621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 121801 + 5041 = 349^2 + 71^2 .

It is a nialpdrome in base 11.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 31709 + ... + 31712.

2¹²⁶⁸⁴² is an apocalyptic number.

126842 is a deficient number, since it is larger than the sum of its proper divisors (63424).

126842 is an equidigital number, since it uses as much as digits as its factorization.

126842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63423.

The product of its digits is 768, while the sum is 23.

The square root of 126842 is about 356.1488452880. The cubic root of 126842 is about 50.2444033931.

The spelling of 126842 in words is "one hundred twenty-six thousand, eight hundred forty-two".