42299449 has 2 divisors, whose sum is σ = 42299450. Its totient is φ = 42299448.

The previous prime is 42299447. The next prime is 42299497. The reversal of 42299449 is 94499224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40094224 + 2205225 = 6332^2 + 1485^2 .

It is a cyclic number.

It is not a de Polignac number, because 42299449 - 2¹ = 42299447 is a prime.

Together with 42299447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42299441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21149724 + 21149725.

It is an arithmetic number, because the mean of its divisors is an integer number (21149725).

Almost surely, 2^42299449 is an apocalyptic number.

It is an amenable number.

42299449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42299449 is an equidigital number, since it uses as much as digits as its factorization.

42299449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 42299449 is about 6503.8026569077. The cubic root of 42299449 is about 348.4268142433.

The spelling of 42299449 in words is "forty-two million, two hundred ninety-nine thousand, four hundred forty-nine".