126605306 has 4 divisors (see below), whose sum is σ = 189907962. Its totient is φ = 63302652.

The previous prime is 126605293. The next prime is 126605309. The reversal of 126605306 is 603506621.

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., 86397025 + 40208281 = 9295^2 + 6341^2 .

It is not an unprimeable number, because it can be changed into a prime (126605309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31651325 + ... + 31651328.

Almost surely, 2^126605306 is an apocalyptic number.

126605306 is a deficient number, since it is larger than the sum of its proper divisors (63302656).

126605306 is an equidigital number, since it uses as much as digits as its factorization.

126605306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63302655.

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

The square root of 126605306 is about 11251.9023280510. The cubic root of 126605306 is about 502.1313101257.

The spelling of 126605306 in words is "one hundred twenty-six million, six hundred five thousand, three hundred six".