42181334 has 8 divisors (see below), whose sum is σ = 68139120. Its totient is φ = 19468296.

The previous prime is 42181331. The next prime is 42181343. The reversal of 42181334 is 43318124.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 1622359 = 42181334 / (4 + 2 + 1 + 8 + 1 + 3 + 3 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42181331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811154 + ... + 811205.

It is an arithmetic number, because the mean of its divisors is an integer number (8517390).

Almost surely, 2^42181334 is an apocalyptic number.

42181334 is a deficient number, since it is larger than the sum of its proper divisors (25957786).

42181334 is a wasteful number, since it uses less digits than its factorization.

42181334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622374.

The product of its digits is 2304, while the sum is 26.

The square root of 42181334 is about 6494.7158521370. The cubic root of 42181334 is about 348.1022016728.

Adding to 42181334 its reverse (43318124), we get a palindrome (85499458).

The spelling of 42181334 in words is "forty-two million, one hundred eighty-one thousand, three hundred thirty-four".