126412409 has 2 divisors, whose sum is σ = 126412410. Its totient is φ = 126412408.

The previous prime is 126412381. The next prime is 126412463. The reversal of 126412409 is 904214621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122168809 + 4243600 = 11053^2 + 2060^2 .

It is a cyclic number.

It is not a de Polignac number, because 126412409 - 2¹² = 126408313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126412009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63206204 + 63206205.

It is an arithmetic number, because the mean of its divisors is an integer number (63206205).

Almost surely, 2^126412409 is an apocalyptic number.

It is an amenable number.

126412409 is a deficient number, since it is larger than the sum of its proper divisors (1).

126412409 is an equidigital number, since it uses as much as digits as its factorization.

126412409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 126412409 is about 11243.3273100093. The cubic root of 126412409 is about 501.8761632177.

The spelling of 126412409 in words is "one hundred twenty-six million, four hundred twelve thousand, four hundred nine".