126403906 has 8 divisors (see below), whose sum is σ = 197849664. Its totient is φ = 60454020.

The previous prime is 126403897. The next prime is 126403913. The reversal of 126403906 is 609304621.

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

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, 1373910 + ... + 1374001.

It is an arithmetic number, because the mean of its divisors is an integer number (24731208).

Almost surely, 2^126403906 is an apocalyptic number.

126403906 is a deficient number, since it is larger than the sum of its proper divisors (71445758).

126403906 is a wasteful number, since it uses less digits than its factorization.

126403906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747936.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 126403906 is about 11242.9491682565. The cubic root of 126403906 is about 501.8649102383.

The spelling of 126403906 in words is "one hundred twenty-six million, four hundred three thousand, nine hundred six".