42012043 has 4 divisors (see below), whose sum is σ = 42028200. Its totient is φ = 41995888.

The previous prime is 42012017. The next prime is 42012073. The reversal of 42012043 is 34021024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42012043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42012073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3193 + ... + 9706.

It is an arithmetic number, because the mean of its divisors is an integer number (10507050).

Almost surely, 2^42012043 is an apocalyptic number.

42012043 is a deficient number, since it is larger than the sum of its proper divisors (16157).

42012043 is a wasteful number, since it uses less digits than its factorization.

42012043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16156.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42012043 is about 6481.6697694344. The cubic root of 42012043 is about 347.6358849556.

Adding to 42012043 its reverse (34021024), we get a palindrome (76033067).

The spelling of 42012043 in words is "forty-two million, twelve thousand, forty-three".