42012235445 has 4 divisors (see below), whose sum is σ = 50414682540. Its totient is φ = 33609788352.

The previous prime is 42012235399. The next prime is 42012235481. The reversal of 42012235445 is 54453221024.

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 17045391364 + 24966844081 = 130558^2 + 158009^2 .

It is a cyclic number.

It is not a de Polignac number, because 42012235445 - 2⁸ = 42012235189 is a prime.

It is a super-2 number, since 2×42012235445² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4201223540 + ... + 4201223549.

It is an arithmetic number, because the mean of its divisors is an integer number (12603670635).

Almost surely, 2^42012235445 is an apocalyptic number.

It is an amenable number.

42012235445 is a deficient number, since it is larger than the sum of its proper divisors (8402447095).

42012235445 is an equidigital number, since it uses as much as digits as its factorization.

42012235445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8402447094.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 42012235445 its reverse (54453221024), we get a palindrome (96465456469).

The spelling of 42012235445 in words is "forty-two billion, twelve million, two hundred thirty-five thousand, four hundred forty-five".