642323 has 4 divisors (see below), whose sum is σ = 700728. Its totient is φ = 583920.

The previous prime is 642281. The next prime is 642359. The reversal of 642323 is 323246.

642323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 642323 - 2¹⁰ = 641299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642295 and 642304.

It is not an unprimeable number, because it can be changed into a prime (642373) 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, 29186 + ... + 29207.

It is an arithmetic number, because the mean of its divisors is an integer number (175182).

2⁶⁴²³²³ is an apocalyptic number.

642323 is a deficient number, since it is larger than the sum of its proper divisors (58405).

642323 is a wasteful number, since it uses less digits than its factorization.

642323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58404.

The product of its digits is 864, while the sum is 20.

The square root of 642323 is about 801.4505599224. The cubic root of 642323 is about 86.2815273666.

Adding to 642323 its reverse (323246), we get a palindrome (965569).

It can be divided in two parts, 6423 and 23, that added together give a palindrome (6446).

The spelling of 642323 in words is "six hundred forty-two thousand, three hundred twenty-three".