642113 has 2 divisors, whose sum is σ = 642114. Its totient is φ = 642112.

The previous prime is 642079. The next prime is 642121. The reversal of 642113 is 311246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 588289 + 53824 = 767^2 + 232^2 .

It is a cyclic number.

It is not a de Polignac number, because 642113 - 2⁶ = 642049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642091 and 642100.

It is not a weakly prime, because it can be changed into another prime (642133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321056 + 321057.

It is an arithmetic number, because the mean of its divisors is an integer number (321057).

2⁶⁴²¹¹³ is an apocalyptic number.

It is an amenable number.

642113 is a deficient number, since it is larger than the sum of its proper divisors (1).

642113 is an equidigital number, since it uses as much as digits as its factorization.

642113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 642113 is about 801.3195367642. The cubic root of 642113 is about 86.2721234293.

Adding to 642113 its reverse (311246), we get a palindrome (953359).

The spelling of 642113 in words is "six hundred forty-two thousand, one hundred thirteen".