42303449 has 2 divisors, whose sum is σ = 42303450. Its totient is φ = 42303448.

The previous prime is 42303421. The next prime is 42303451. The reversal of 42303449 is 94430324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42159049 + 144400 = 6493^2 + 380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42303449 is a prime.

Together with 42303451, 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 (42303479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21151724 + 21151725.

It is an arithmetic number, because the mean of its divisors is an integer number (21151725).

Almost surely, 2^42303449 is an apocalyptic number.

It is an amenable number.

42303449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42303449 is an equidigital number, since it uses as much as digits as its factorization.

42303449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 42303449 is about 6504.1101620437. The cubic root of 42303449 is about 348.4377967609.

The spelling of 42303449 in words is "forty-two million, three hundred three thousand, four hundred forty-nine".