126267409 has 4 divisors (see below), whose sum is σ = 126290416. Its totient is φ = 126244404.

The previous prime is 126267397. The next prime is 126267419. The reversal of 126267409 is 904762621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126267409 - 2¹⁷ = 126136337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126267419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2062 + ... + 16024.

It is an arithmetic number, because the mean of its divisors is an integer number (31572604).

Almost surely, 2^126267409 is an apocalyptic number.

It is an amenable number.

126267409 is a deficient number, since it is larger than the sum of its proper divisors (23007).

126267409 is an equidigital number, since it uses as much as digits as its factorization.

126267409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23006.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 126267409 is about 11236.8771907501. The cubic root of 126267409 is about 501.6841992428.

The spelling of 126267409 in words is "one hundred twenty-six million, two hundred sixty-seven thousand, four hundred nine".