42547549 has 24 divisors (see below), whose sum is σ = 50701248. Its totient is φ = 35283840.

The previous prime is 42547529. The next prime is 42547577. The reversal of 42547549 is 94574524.

42547549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-42547549 is a prime.

It is a Duffinian number.

Its product of digits (201600) is a multiple of the sum of its prime factors (225).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42547529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 413032 + ... + 413134.

It is an arithmetic number, because the mean of its divisors is an integer number (2112552).

Almost surely, 2^42547549 is an apocalyptic number.

It is an amenable number.

42547549 is a deficient number, since it is larger than the sum of its proper divisors (8153699).

42547549 is a wasteful number, since it uses less digits than its factorization.

42547549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 178 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 42547549 is about 6522.8482275767. The cubic root of 42547549 is about 349.1066988477.

It can be divided in two parts, 425475 and 49, that added together give a palindrome (425524).

The spelling of 42547549 in words is "forty-two million, five hundred forty-seven thousand, five hundred forty-nine".