642326 has 4 divisors (see below), whose sum is σ = 963492. Its totient is φ = 321162.

The previous prime is 642281. The next prime is 642359. The reversal of 642326 is 623246.

642326 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160580 + ... + 160583.

It is an arithmetic number, because the mean of its divisors is an integer number (240873).

2⁶⁴²³²⁶ is an apocalyptic number.

642326 is a deficient number, since it is larger than the sum of its proper divisors (321166).

642326 is a wasteful number, since it uses less digits than its factorization.

642326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321165.

The product of its digits is 1728, while the sum is 23.

The square root of 642326 is about 801.4524315267. The cubic root of 642326 is about 86.2816616938.

The spelling of 642326 in words is "six hundred forty-two thousand, three hundred twenty-six".