126311305 has 8 divisors (see below), whose sum is σ = 151640712. Its totient is φ = 101004288.

The previous prime is 126311257. The next prime is 126311347. The reversal of 126311305 is 503113621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70241161 + 56070144 = 8381^2 + 7488^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 126311305 - 2⁷ = 126311177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11659 + ... + 19711.

It is an arithmetic number, because the mean of its divisors is an integer number (18955089).

Almost surely, 2^126311305 is an apocalyptic number.

It is an amenable number.

126311305 is a deficient number, since it is larger than the sum of its proper divisors (25329407).

126311305 is an equidigital number, since it uses as much as digits as its factorization.

126311305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11195.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 126311305 is about 11238.8302327244. The cubic root of 126311305 is about 501.7423281993.

Adding to 126311305 its reverse (503113621), we get a palindrome (629424926).

The spelling of 126311305 in words is "one hundred twenty-six million, three hundred eleven thousand, three hundred five".