42000045 has 8 divisors (see below), whose sum is σ = 67200096. Its totient is φ = 22400016.

The previous prime is 42000037. The next prime is 42000059. The reversal of 42000045 is 54000024.

42000045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42000045 - 2³ = 42000037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 2800003 = 42000045 / (4 + 2 + 0 + 0 + 0 + 0 + 4 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 41999988 and 42000033.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1399987 + ... + 1400016.

It is an arithmetic number, because the mean of its divisors is an integer number (8400012).

Almost surely, 2^42000045 is an apocalyptic number.

It is an amenable number.

42000045 is a deficient number, since it is larger than the sum of its proper divisors (25200051).

42000045 is a wasteful number, since it uses less digits than its factorization.

42000045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800011.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 42000045 is about 6480.7441702323. The cubic root of 42000045 is about 347.6027886324.

Adding to 42000045 its reverse (54000024), we get a palindrome (96000069).

The spelling of 42000045 in words is "forty-two million, forty-five", and thus it is an aban number and an uban number.