124420409 has 4 divisors (see below), whose sum is σ = 129830016. Its totient is φ = 119010804.

The previous prime is 124420393. The next prime is 124420427. The reversal of 124420409 is 904024421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 904024421 = 12049 ⋅75029.

It is a cyclic number.

It is not a de Polignac number, because 124420409 - 2⁴ = 124420393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124420489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2704769 + ... + 2704814.

It is an arithmetic number, because the mean of its divisors is an integer number (32457504).

Almost surely, 2^124420409 is an apocalyptic number.

It is an amenable number.

124420409 is a deficient number, since it is larger than the sum of its proper divisors (5409607).

124420409 is an equidigital number, since it uses as much as digits as its factorization.

124420409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5409606.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 124420409 is about 11154.3896740252. The cubic root of 124420409 is about 499.2260145111.

The spelling of 124420409 in words is "one hundred twenty-four million, four hundred twenty thousand, four hundred nine".