420403 has 4 divisors (see below), whose sum is σ = 424440. Its totient is φ = 416368.

The previous prime is 420397. The next prime is 420419. The reversal of 420403 is 304024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420403 - 2¹³ = 412211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420103) 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, 1858 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (106110).

2⁴²⁰⁴⁰³ is an apocalyptic number.

420403 is a deficient number, since it is larger than the sum of its proper divisors (4037).

420403 is a wasteful number, since it uses less digits than its factorization.

420403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036.

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

The square root of 420403 is about 648.3849165426. The cubic root of 420403 is about 74.9126687198.

Adding to 420403 its reverse (304024), we get a palindrome (724427).

The spelling of 420403 in words is "four hundred twenty thousand, four hundred three", and thus it is an iban number.