42549039 has 24 divisors (see below), whose sum is σ = 66437280. Its totient is φ = 26085312.

The previous prime is 42549029. The next prime is 42549043. The reversal of 42549039 is 93094524.

It is not a de Polignac number, because 42549039 - 2⁷ = 42548911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42548994 and 42549012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42549029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41497 + ... + 42509.

It is an arithmetic number, because the mean of its divisors is an integer number (2768220).

Almost surely, 2^42549039 is an apocalyptic number.

42549039 is a deficient number, since it is larger than the sum of its proper divisors (23888241).

42549039 is a wasteful number, since it uses less digits than its factorization.

42549039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391 (or 1388 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 42549039 is about 6522.9624404867. The cubic root of 42549039 is about 349.1107739976.

It can be divided in two parts, 42 and 549039, that added together give a square (549081 = 741²).

The spelling of 42549039 in words is "forty-two million, five hundred forty-nine thousand, thirty-nine".