642133 has 2 divisors, whose sum is σ = 642134. Its totient is φ = 642132.

The previous prime is 642121. The next prime is 642149. The reversal of 642133 is 331246.

642133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 636804 + 5329 = 798^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 642133 - 2¹⁷ = 511061 is a prime.

It is an Ulam number.

642133 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 642133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321066 + 321067.

It is an arithmetic number, because the mean of its divisors is an integer number (321067).

2⁶⁴²¹³³ is an apocalyptic number.

It is an amenable number.

642133 is a deficient number, since it is larger than the sum of its proper divisors (1).

642133 is an equidigital number, since it uses as much as digits as its factorization.

642133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 19.

The square root of 642133 is about 801.3320160832. The cubic root of 642133 is about 86.2730191307.

Adding to 642133 its reverse (331246), we get a palindrome (973379).

It can be divided in two parts, 64 and 2133, that added together give a cube (2197 = 13³).

The spelling of 642133 in words is "six hundred forty-two thousand, one hundred thirty-three".