42005134525 has 6 divisors (see below), whose sum is σ = 52086366842. Its totient is φ = 33604107600.

The previous prime is 42005134517. The next prime is 42005134601. The reversal of 42005134525 is 52543150024.

It can be written as a sum of positive squares in 3 ways, for example, as 14965607556 + 27039526969 = 122334^2 + 164437^2 .

It is not a de Polignac number, because 42005134525 - 2³ = 42005134517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 840102666 + ... + 840102715.

Almost surely, 2^42005134525 is an apocalyptic number.

It is an amenable number.

42005134525 is a deficient number, since it is larger than the sum of its proper divisors (10081232317).

42005134525 is a wasteful number, since it uses less digits than its factorization.

42005134525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680205391 (or 1680205386 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 42005134525 its reverse (52543150024), we get a palindrome (94548284549).

The spelling of 42005134525 in words is "forty-two billion, five million, one hundred thirty-four thousand, five hundred twenty-five".