42115812 has 24 divisors (see below), whose sum is σ = 98843136. Its totient is φ = 13956768.

The previous prime is 42115789. The next prime is 42115813. The reversal of 42115812 is 21851124.

It is not an unprimeable number, because it can be changed into a prime (42115813) 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, 8068 + ... + 12219.

It is an arithmetic number, because the mean of its divisors is an integer number (4118464).

Almost surely, 2^42115812 is an apocalyptic number.

It is an amenable number.

42115812 is an abundant number, since it is smaller than the sum of its proper divisors (56727324).

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

42115812 is a wasteful number, since it uses less digits than its factorization.

42115812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20467 (or 20465 counting only the distinct ones).

The product of its digits is 640, while the sum is 24.

The square root of 42115812 is about 6489.6696372003. The cubic root of 42115812 is about 347.9218677809.

Adding to 42115812 its reverse (21851124), we get a palindrome (63966936).

The spelling of 42115812 in words is "forty-two million, one hundred fifteen thousand, eight hundred twelve".