126406 has 8 divisors (see below), whose sum is σ = 216720. Its totient is φ = 54168.

The previous prime is 126397. The next prime is 126421. The reversal of 126406 is 604621.

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

It is a congruent number.

It is an unprimeable number.

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, 4501 + ... + 4528.

It is an arithmetic number, because the mean of its divisors is an integer number (27090).

2¹²⁶⁴⁰⁶ is an apocalyptic number.

126406 is a deficient number, since it is larger than the sum of its proper divisors (90314).

126406 is an equidigital number, since it uses as much as digits as its factorization.

126406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9038.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 126406 is about 355.5362147517. The cubic root of 126406 is about 50.1867681512.

The spelling of 126406 in words is "one hundred twenty-six thousand, four hundred six".