642103 has 16 divisors (see below), whose sum is σ = 829440. Its totient is φ = 482400.

The previous prime is 642079. The next prime is 642113. The reversal of 642103 is 301246.

642103 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is not a de Polignac number, because 642103 - 2⁵ = 642071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2253 + ... + 2521.

It is an arithmetic number, because the mean of its divisors is an integer number (51840).

2⁶⁴²¹⁰³ is an apocalyptic number.

642103 is a deficient number, since it is larger than the sum of its proper divisors (187337).

642103 is a wasteful number, since it uses less digits than its factorization.

642103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 642103 is about 801.3132970318. The cubic root of 642103 is about 86.2716755716.

Adding to 642103 its reverse (301246), we get a palindrome (943349).

The spelling of 642103 in words is "six hundred forty-two thousand, one hundred three".