42055047 has 12 divisors (see below), whose sum is σ = 61742824. Its totient is φ = 27576720.

The previous prime is 42055033. The next prime is 42055099. The reversal of 42055047 is 74055024.

It is not a de Polignac number, because 42055047 - 2¹² = 42050951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42055047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42055147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37753 + ... + 38850.

Almost surely, 2^42055047 is an apocalyptic number.

42055047 is a deficient number, since it is larger than the sum of its proper divisors (19687777).

42055047 is a wasteful number, since it uses less digits than its factorization.

42055047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76670 (or 76667 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 42055047 is about 6484.9862760071. The cubic root of 42055047 is about 347.7544591749.

The spelling of 42055047 in words is "forty-two million, fifty-five thousand, forty-seven".