126224409 has 4 divisors (see below), whose sum is σ = 168299216. Its totient is φ = 84149604.

The previous prime is 126224387. The next prime is 126224471. The reversal of 126224409 is 904422621.

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 not a de Polignac number, because 126224409 - 2¹⁶ = 126158873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126224309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21037399 + ... + 21037404.

It is an arithmetic number, because the mean of its divisors is an integer number (42074804).

Almost surely, 2^126224409 is an apocalyptic number.

It is an amenable number.

126224409 is a deficient number, since it is larger than the sum of its proper divisors (42074807).

126224409 is an equidigital number, since it uses as much as digits as its factorization.

126224409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42074806.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 126224409 is about 11234.9636848545. The cubic root of 126224409 is about 501.6272437438.

The spelling of 126224409 in words is "one hundred twenty-six million, two hundred twenty-four thousand, four hundred nine".