42143165 has 4 divisors (see below), whose sum is σ = 50571804. Its totient is φ = 33714528.

The previous prime is 42143141. The next prime is 42143183. The reversal of 42143165 is 56134124.

42143165 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 can be written as a sum of positive squares in 2 ways, for example, as 4713241 + 37429924 = 2171^2 + 6118^2 .

It is a cyclic number.

It is not a de Polignac number, because 42143165 - 2⁸ = 42142909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4214312 + ... + 4214321.

It is an arithmetic number, because the mean of its divisors is an integer number (12642951).

Almost surely, 2^42143165 is an apocalyptic number.

It is an amenable number.

42143165 is a deficient number, since it is larger than the sum of its proper divisors (8428639).

42143165 is an equidigital number, since it uses as much as digits as its factorization.

42143165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8428638.

The product of its digits is 2880, while the sum is 26.

The square root of 42143165 is about 6491.7767213606. The cubic root of 42143165 is about 347.9971732056.

Adding to 42143165 its reverse (56134124), we get a palindrome (98277289).

The spelling of 42143165 in words is "forty-two million, one hundred forty-three thousand, one hundred sixty-five".