42181530 has 16 divisors (see below), whose sum is σ = 101235744. Its totient is φ = 11248400.

The previous prime is 42181523. The next prime is 42181537. The reversal of 42181530 is 3518124.

It is an interprime number because it is at equal distance from previous prime (42181523) and next prime (42181537).

It is a self number, because there is not a number n which added to its sum of digits gives 42181530.

It is not an unprimeable number, because it can be changed into a prime (42181537) 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, 702996 + ... + 703055.

It is an arithmetic number, because the mean of its divisors is an integer number (6327234).

Almost surely, 2^42181530 is an apocalyptic number.

42181530 is an abundant number, since it is smaller than the sum of its proper divisors (59054214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42181530 is a wasteful number, since it uses less digits than its factorization.

42181530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406061.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 42181530 is about 6494.7309413093. The cubic root of 42181530 is about 348.1027408365.

Adding to 42181530 its reverse (3518124), we get a palindrome (45699654).

The spelling of 42181530 in words is "forty-two million, one hundred eighty-one thousand, five hundred thirty".