42442403 has 2 divisors, whose sum is σ = 42442404. Its totient is φ = 42442402.

The previous prime is 42442391. The next prime is 42442427. The reversal of 42442403 is 30424424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42442403 - 2¹⁴ = 42426019 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42442483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221201 + 21221202.

It is an arithmetic number, because the mean of its divisors is an integer number (21221202).

Almost surely, 2^42442403 is an apocalyptic number.

42442403 is a deficient number, since it is larger than the sum of its proper divisors (1).

42442403 is an equidigital number, since it uses as much as digits as its factorization.

42442403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 42442403 is about 6514.7834192704. The cubic root of 42442403 is about 348.8188839752.

Adding to 42442403 its reverse (30424424), we get a palindrome (72866827).

The spelling of 42442403 in words is "forty-two million, four hundred forty-two thousand, four hundred three".