126261305 has 8 divisors (see below), whose sum is σ = 151585992. Its totient is φ = 100960768.

The previous prime is 126261301. The next prime is 126261307. The reversal of 126261305 is 503162621.

It can be written as a sum of positive squares in 4 ways, for example, as 350464 + 125910841 = 592^2 + 11221^2 .

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 126261305 - 2² = 126261301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126261301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8777 + ... + 18153.

It is an arithmetic number, because the mean of its divisors is an integer number (18948249).

Almost surely, 2^126261305 is an apocalyptic number.

It is an amenable number.

126261305 is a deficient number, since it is larger than the sum of its proper divisors (25324687).

126261305 is an equidigital number, since it uses as much as digits as its factorization.

126261305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12075.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 126261305 is about 11236.6055817582. The cubic root of 126261305 is about 501.6761149986.

It can be divided in two parts, 12626 and 1305, that added together give a palindrome (13931).

The spelling of 126261305 in words is "one hundred twenty-six million, two hundred sixty-one thousand, three hundred five".