126506603 has 4 divisors (see below), whose sum is σ = 126529128. Its totient is φ = 126484080.

The previous prime is 126506543. The next prime is 126506623. The reversal of 126506603 is 306605621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 126506603 - 2⁶ = 126506539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126506623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4775 + ... + 16607.

It is an arithmetic number, because the mean of its divisors is an integer number (31632282).

Almost surely, 2^126506603 is an apocalyptic number.

126506603 is a deficient number, since it is larger than the sum of its proper divisors (22525).

126506603 is a wasteful number, since it uses less digits than its factorization.

126506603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22524.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 126506603 is about 11247.5154145260. The cubic root of 126506603 is about 502.0007870233. Note that the first 3 decimals are identical.

The spelling of 126506603 in words is "one hundred twenty-six million, five hundred six thousand, six hundred three".