42012403 has 2 divisors, whose sum is σ = 42012404. Its totient is φ = 42012402.

The previous prime is 42012379. The next prime is 42012431. The reversal of 42012403 is 30421024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42012403 - 2⁵ = 42012371 is a prime.

It is not a weakly prime, because it can be changed into another prime (42012203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006201 + 21006202.

It is an arithmetic number, because the mean of its divisors is an integer number (21006202).

Almost surely, 2^42012403 is an apocalyptic number.

42012403 is a deficient number, since it is larger than the sum of its proper divisors (1).

42012403 is an equidigital number, since it uses as much as digits as its factorization.

42012403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42012403 is about 6481.6975399968. The cubic root of 42012403 is about 347.6368779135.

Adding to 42012403 its reverse (30421024), we get a palindrome (72433427).

The spelling of 42012403 in words is "forty-two million, twelve thousand, four hundred three".