42042143131145 has 4 divisors (see below), whose sum is σ = 50450571757380. Its totient is φ = 33633714504912.

The previous prime is 42042143131139. The next prime is 42042143131283. The reversal of 42042143131145 is 54113134124024.

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 8389474738681 + 33652668392464 = 2896459^2 + 5801092^2 .

It is a cyclic number.

It is not a de Polignac number, because 42042143131145 - 2⁶ = 42042143131081 is a prime.

It is a super-2 number, since 2×42042143131145² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4204214313110 + ... + 4204214313119.

It is an arithmetic number, because the mean of its divisors is an integer number (12612642939345).

Almost surely, 2^{42042143131145} is an apocalyptic number.

It is an amenable number.

42042143131145 is a deficient number, since it is larger than the sum of its proper divisors (8408428626235).

42042143131145 is an equidigital number, since it uses as much as digits as its factorization.

42042143131145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408428626234.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 42042143131145 its reverse (54113134124024), we get a palindrome (96155277255169).

The spelling of 42042143131145 in words is "forty-two trillion, forty-two billion, one hundred forty-three million, one hundred thirty-one thousand, one hundred forty-five".