126244409 has 2 divisors, whose sum is σ = 126244410. Its totient is φ = 126244408.

The previous prime is 126244403. The next prime is 126244421. The reversal of 126244409 is 904442621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110838784 + 15405625 = 10528^2 + 3925^2 .

It is a cyclic number.

It is not a de Polignac number, because 126244409 - 2¹⁶ = 126178873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126244403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63122204 + 63122205.

It is an arithmetic number, because the mean of its divisors is an integer number (63122205).

Almost surely, 2^126244409 is an apocalyptic number.

It is an amenable number.

126244409 is a deficient number, since it is larger than the sum of its proper divisors (1).

126244409 is an equidigital number, since it uses as much as digits as its factorization.

126244409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 126244409 is about 11235.8537281330. The cubic root of 126244409 is about 501.6537362823.

The spelling of 126244409 in words is "one hundred twenty-six million, two hundred forty-four thousand, four hundred nine".