42299123 has 2 divisors, whose sum is σ = 42299124. Its totient is φ = 42299122.

The previous prime is 42299099. The next prime is 42299171. The reversal of 42299123 is 32199224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42299123 - 2¹² = 42295027 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42299123.

It is not a weakly prime, because it can be changed into another prime (42299183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21149561 + 21149562.

It is an arithmetic number, because the mean of its divisors is an integer number (21149562).

Almost surely, 2^42299123 is an apocalyptic number.

42299123 is a deficient number, since it is larger than the sum of its proper divisors (1).

42299123 is an equidigital number, since it uses as much as digits as its factorization.

42299123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 42299123 is about 6503.7775945984. Note that the first 3 decimals coincide. The cubic root of 42299123 is about 348.4259191376.

The spelling of 42299123 in words is "forty-two million, two hundred ninety-nine thousand, one hundred twenty-three".