126351409 has 2 divisors, whose sum is σ = 126351410. Its totient is φ = 126351408.

The previous prime is 126351403. The next prime is 126351419. The reversal of 126351409 is 904153621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118200384 + 8151025 = 10872^2 + 2855^2 .

It is a cyclic number.

It is not a de Polignac number, because 126351409 - 2¹⁵ = 126318641 is a prime.

It is not a weakly prime, because it can be changed into another prime (126351403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63175704 + 63175705.

It is an arithmetic number, because the mean of its divisors is an integer number (63175705).

Almost surely, 2^126351409 is an apocalyptic number.

It is an amenable number.

126351409 is a deficient number, since it is larger than the sum of its proper divisors (1).

126351409 is an equidigital number, since it uses as much as digits as its factorization.

126351409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 126351409 is about 11240.6142625748. The cubic root of 126351409 is about 501.7954238562.

The spelling of 126351409 in words is "one hundred twenty-six million, three hundred fifty-one thousand, four hundred nine".