126436709 has 6 divisors (see below), whose sum is σ = 147079494. Its totient is φ = 108374280.

The previous prime is 126436703. The next prime is 126436711. The reversal of 126436709 is 907634621.

It can be written as a sum of positive squares in only one way, i.e., 69388900 + 57047809 = 8330^2 + 7553^2 .

It is a de Polignac number, because none of the positive numbers 2^k-126436709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126436703) 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 5 ways as a sum of consecutive naturals, for example, 1290122 + ... + 1290219.

It is an arithmetic number, because the mean of its divisors is an integer number (24513249).

Almost surely, 2^126436709 is an apocalyptic number.

It is an amenable number.

126436709 is a deficient number, since it is larger than the sum of its proper divisors (20642785).

126436709 is an equidigital number, since it uses as much as digits as its factorization.

126436709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580355 (or 2580348 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 126436709 is about 11244.4078990403. The cubic root of 126436709 is about 501.9083193684.

It can be divided in two parts, 1264 and 36709, that added together give a palindrome (37973).

The spelling of 126436709 in words is "one hundred twenty-six million, four hundred thirty-six thousand, seven hundred nine".