42342449 has 2 divisors, whose sum is σ = 42342450. Its totient is φ = 42342448.

The previous prime is 42342439. The next prime is 42342451. The reversal of 42342449 is 94424324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 7118224 = 5935^2 + 2668^2 .

It is a cyclic number.

It is not a de Polignac number, because 42342449 - 2¹² = 42338353 is a prime.

Together with 42342451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42342439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21171224 + 21171225.

It is an arithmetic number, because the mean of its divisors is an integer number (21171225).

Almost surely, 2^42342449 is an apocalyptic number.

It is an amenable number.

42342449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42342449 is an equidigital number, since it uses as much as digits as its factorization.

42342449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 32.

The square root of 42342449 is about 6507.1075755669. The cubic root of 42342449 is about 348.5448400443.

The spelling of 42342449 in words is "forty-two million, three hundred forty-two thousand, four hundred forty-nine".