126319906 has 4 divisors (see below), whose sum is σ = 189479862. Its totient is φ = 63159952.

The previous prime is 126319903. The next prime is 126319913. The reversal of 126319906 is 609913621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609913621 = 59 ⋅10337519.

It can be written as a sum of positive squares in only one way, i.e., 72165025 + 54154881 = 8495^2 + 7359^2 .

It is not an unprimeable number, because it can be changed into a prime (126319901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31579975 + ... + 31579978.

Almost surely, 2^126319906 is an apocalyptic number.

126319906 is a deficient number, since it is larger than the sum of its proper divisors (63159956).

126319906 is an equidigital number, since it uses as much as digits as its factorization.

126319906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63159955.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 126319906 is about 11239.2128727950. The cubic root of 126319906 is about 501.7537164326.

The spelling of 126319906 in words is "one hundred twenty-six million, three hundred nineteen thousand, nine hundred six".