42548181 has 8 divisors (see below), whose sum is σ = 61094880. Its totient is φ = 26183472.

The previous prime is 42548179. The next prime is 42548189. The reversal of 42548181 is 18184524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42548181 - 2¹ = 42548179 is a prime.

It is a super-2 number, since 2×42548181² = 3620695412817522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42548189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545451 + ... + 545528.

It is an arithmetic number, because the mean of its divisors is an integer number (7636860).

Almost surely, 2^42548181 is an apocalyptic number.

It is an amenable number.

42548181 is a deficient number, since it is larger than the sum of its proper divisors (18546699).

42548181 is a wasteful number, since it uses less digits than its factorization.

42548181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090995.

The product of its digits is 10240, while the sum is 33.

The square root of 42548181 is about 6522.8966724914. The cubic root of 42548181 is about 349.1084273793.

The spelling of 42548181 in words is "forty-two million, five hundred forty-eight thousand, one hundred eighty-one".