42012105 has 16 divisors (see below), whose sum is σ = 67426944. Its totient is φ = 22337280.

The previous prime is 42012079. The next prime is 42012107. The reversal of 42012105 is 50121024.

It is not a de Polignac number, because 42012105 - 2⁵ = 42012073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (42012107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 900 + ... + 9210.

It is an arithmetic number, because the mean of its divisors is an integer number (4214184).

Almost surely, 2^42012105 is an apocalyptic number.

It is an amenable number.

42012105 is a deficient number, since it is larger than the sum of its proper divisors (25414839).

42012105 is a wasteful number, since it uses less digits than its factorization.

42012105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8656.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 42012105 is about 6481.6745521509. The cubic root of 42012105 is about 347.6360559654.

Adding to 42012105 its reverse (50121024), we get a palindrome (92133129).

The spelling of 42012105 in words is "forty-two million, twelve thousand, one hundred five".