124342109 has 4 divisors (see below), whose sum is σ = 124384380. Its totient is φ = 124299840.

The previous prime is 124342037. The next prime is 124342123. The reversal of 124342109 is 901243421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22534009 + 101808100 = 4747^2 + 10090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124342109 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 (124342409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16364 + ... + 22725.

It is an arithmetic number, because the mean of its divisors is an integer number (31096095).

Almost surely, 2^124342109 is an apocalyptic number.

It is an amenable number.

124342109 is a deficient number, since it is larger than the sum of its proper divisors (42271).

124342109 is an equidigital number, since it uses as much as digits as its factorization.

124342109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42270.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 124342109 is about 11150.8792926836. The cubic root of 124342109 is about 499.1212685668.

The spelling of 124342109 in words is "one hundred twenty-four million, three hundred forty-two thousand, one hundred nine".