642273 has 4 divisors (see below), whose sum is σ = 856368. Its totient is φ = 428180.

The previous prime is 642253. The next prime is 642281. The reversal of 642273 is 372246.

642273 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 642273 - 2⁵ = 642241 is a prime.

It is a D-number.

642273 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (642223) 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, 107043 + ... + 107048.

It is an arithmetic number, because the mean of its divisors is an integer number (214092).

2⁶⁴²²⁷³ is an apocalyptic number.

It is an amenable number.

642273 is a deficient number, since it is larger than the sum of its proper divisors (214095).

642273 is a wasteful number, since it uses less digits than its factorization.

642273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214094.

The product of its digits is 2016, while the sum is 24.

The square root of 642273 is about 801.4193658753. The cubic root of 642273 is about 86.2792885199.

The spelling of 642273 in words is "six hundred forty-two thousand, two hundred seventy-three".