42181104 has 40 divisors (see below), whose sum is σ = 124535680. Its totient is φ = 12051648.

The previous prime is 42181093. The next prime is 42181127. The reversal of 42181104 is 40118124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 62434 + ... + 63105.

It is an arithmetic number, because the mean of its divisors is an integer number (3113392).

Almost surely, 2^42181104 is an apocalyptic number.

It is an amenable number.

42181104 is an abundant number, since it is smaller than the sum of its proper divisors (82354576).

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

42181104 is a wasteful number, since it uses less digits than its factorization.

42181104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125557 (or 125551 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 42181104 is about 6494.6981454106. The cubic root of 42181104 is about 348.1015689787.

Adding to 42181104 its reverse (40118124), we get a palindrome (82299228).

The spelling of 42181104 in words is "forty-two million, one hundred eighty-one thousand, one hundred four".