42403 has 2 divisors, whose sum is σ = 42404. Its totient is φ = 42402.

The previous prime is 42397. The next prime is 42407. The reversal of 42403 is 30424.

42403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42403 - 2¹³ = 34211 is a prime.

42403 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (42407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21201 + 21202.

It is an arithmetic number, because the mean of its divisors is an integer number (21202).

2⁴²⁴⁰³ is an apocalyptic number.

42403 is a deficient number, since it is larger than the sum of its proper divisors (1).

42403 is an equidigital number, since it uses as much as digits as its factorization.

42403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 42403 is about 205.9198873349. The cubic root of 42403 is about 34.8710904179.

Adding to 42403 its reverse (30424), we get a palindrome (72827).

It can be divided in two parts, 4240 and 3, that multiplied together give a triangular number (12720 = T₁₅₉).

The spelling of 42403 in words is "forty-two thousand, four hundred three", and thus it is an iban number.