42543113 has 2 divisors, whose sum is σ = 42543114. Its totient is φ = 42543112.

The previous prime is 42543101. The next prime is 42543121. The reversal of 42543113 is 31134524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42471289 + 71824 = 6517^2 + 268^2 .

It is a cyclic number.

It is not a de Polignac number, because 42543113 - 2⁴ = 42543097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42543713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271556 + 21271557.

It is an arithmetic number, because the mean of its divisors is an integer number (21271557).

Almost surely, 2^42543113 is an apocalyptic number.

It is an amenable number.

42543113 is a deficient number, since it is larger than the sum of its proper divisors (1).

42543113 is an equidigital number, since it uses as much as digits as its factorization.

42543113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 42543113 is about 6522.5081832068. The cubic root of 42543113 is about 349.0945658250.

Adding to 42543113 its reverse (31134524), we get a palindrome (73677637).

The spelling of 42543113 in words is "forty-two million, five hundred forty-three thousand, one hundred thirteen".