321042403 has 12 divisors (see below), whose sum is σ = 355269600. Its totient is φ = 289881680.

The previous prime is 321042401. The next prime is 321042413. The reversal of 321042403 is 304240123.

It is not a de Polignac number, because 321042403 - 2¹ = 321042401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321042401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9126 + ... + 26932.

It is an arithmetic number, because the mean of its divisors is an integer number (29605800).

Almost surely, 2^321042403 is an apocalyptic number.

321042403 is a deficient number, since it is larger than the sum of its proper divisors (34227197).

321042403 is a wasteful number, since it uses less digits than its factorization.

321042403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17978 (or 17967 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 321042403 is about 17917.6561804272. The cubic root of 321042403 is about 684.7322753647.

Adding to 321042403 its reverse (304240123), we get a palindrome (625282526).

The spelling of 321042403 in words is "three hundred twenty-one million, forty-two thousand, four hundred three".