42545121043 has 16 divisors (see below), whose sum is σ = 47482122240. Its totient is φ = 37884240000.

The previous prime is 42545121041. The next prime is 42545121053. The reversal of 42545121043 is 34012154524.

It is a cyclic number.

It is not a de Polignac number, because 42545121043 - 2¹ = 42545121041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42545120996 and 42545121014.

It is not an unprimeable number, because it can be changed into a prime (42545121041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 154878 + ... + 330268.

It is an arithmetic number, because the mean of its divisors is an integer number (2967632640).

Almost surely, 2^42545121043 is an apocalyptic number.

42545121043 is a deficient number, since it is larger than the sum of its proper divisors (4937001197).

42545121043 is a wasteful number, since it uses less digits than its factorization.

42545121043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176178.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 42545121043 its reverse (34012154524), we get a palindrome (76557275567).

The spelling of 42545121043 in words is "forty-two billion, five hundred forty-five million, one hundred twenty-one thousand, forty-three".