124134509 has 4 divisors (see below), whose sum is σ = 128138880. Its totient is φ = 120130140.

The previous prime is 124134487. The next prime is 124134547. The reversal of 124134509 is 905431421.

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: 905431421 = 229 ⋅3953849.

It is a cyclic number.

It is not a de Polignac number, because 124134509 - 2⁸ = 124134253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124134589) 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, 2002139 + ... + 2002200.

It is an arithmetic number, because the mean of its divisors is an integer number (32034720).

Almost surely, 2^124134509 is an apocalyptic number.

It is an amenable number.

124134509 is a deficient number, since it is larger than the sum of its proper divisors (4004371).

124134509 is an equidigital number, since it uses as much as digits as its factorization.

124134509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004370.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 124134509 is about 11141.5667210676. The cubic root of 124134509 is about 498.8433383308.

The spelling of 124134509 in words is "one hundred twenty-four million, one hundred thirty-four thousand, five hundred nine".