42000145673 has 4 divisors (see below), whose sum is σ = 42213344580. Its totient is φ = 41786946768.

The previous prime is 42000145631. The next prime is 42000145699. The reversal of 42000145673 is 37654100024.

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 41317473289 + 682672384 = 203267^2 + 26128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42000145673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42000145613) 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 3 ways as a sum of consecutive naturals, for example, 106599158 + ... + 106599551.

It is an arithmetic number, because the mean of its divisors is an integer number (10553336145).

Almost surely, 2^42000145673 is an apocalyptic number.

It is an amenable number.

42000145673 is a deficient number, since it is larger than the sum of its proper divisors (213198907).

42000145673 is a wasteful number, since it uses less digits than its factorization.

42000145673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213198906.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 42000145673 its reverse (37654100024), we get a palindrome (79654245697).

The spelling of 42000145673 in words is "forty-two billion, one hundred forty-five thousand, six hundred seventy-three".