42549863 has 4 divisors (see below), whose sum is σ = 42701568. Its totient is φ = 42398160.

The previous prime is 42549853. The next prime is 42549877. The reversal of 42549863 is 36894524.

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

It is a cyclic number.

It is not a de Polignac number, because 42549863 - 2⁴ = 42549847 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 42549863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42549823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75431 + ... + 75992.

It is an arithmetic number, because the mean of its divisors is an integer number (10675392).

Almost surely, 2^42549863 is an apocalyptic number.

42549863 is a deficient number, since it is larger than the sum of its proper divisors (151705).

42549863 is a wasteful number, since it uses less digits than its factorization.

42549863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151704.

The product of its digits is 207360, while the sum is 41.

The square root of 42549863 is about 6523.0256016668. The cubic root of 42549863 is about 349.1130275966.

The spelling of 42549863 in words is "forty-two million, five hundred forty-nine thousand, eight hundred sixty-three".