42109112 has 8 divisors (see below), whose sum is σ = 78954600. Its totient is φ = 21054552.

The previous prime is 42109099. The next prime is 42109117. The reversal of 42109112 is 21190124.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42109117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2631812 + ... + 2631827.

It is an arithmetic number, because the mean of its divisors is an integer number (9869325).

Almost surely, 2^42109112 is an apocalyptic number.

It is an amenable number.

42109112 is a deficient number, since it is larger than the sum of its proper divisors (36845488).

42109112 is a wasteful number, since it uses less digits than its factorization.

42109112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263645 (or 5263641 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 42109112 is about 6489.1534116555. The cubic root of 42109112 is about 347.9034170691.

Adding to 42109112 its reverse (21190124), we get a palindrome (63299236).

The spelling of 42109112 in words is "forty-two million, one hundred nine thousand, one hundred twelve".