42306403 has 4 divisors (see below), whose sum is σ = 42319800. Its totient is φ = 42293008.

The previous prime is 42306401. The next prime is 42306449. The reversal of 42306403 is 30460324.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42306403 - 2¹ = 42306401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42306401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 951 + ... + 9247.

It is an arithmetic number, because the mean of its divisors is an integer number (10579950).

Almost surely, 2^42306403 is an apocalyptic number.

42306403 is a deficient number, since it is larger than the sum of its proper divisors (13397).

42306403 is an equidigital number, since it uses as much as digits as its factorization.

42306403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13396.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 42306403 is about 6504.3372452541. The cubic root of 42306403 is about 348.4459069057.

Adding to 42306403 its reverse (30460324), we get a palindrome (72766727).

The spelling of 42306403 in words is "forty-two million, three hundred six thousand, four hundred three".