42112312 has 32 divisors (see below), whose sum is σ = 87609600. Its totient is φ = 18815200.

The previous prime is 42112297. The next prime is 42112331. The reversal of 42112312 is 21321124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137 + ... + 9247.

It is an arithmetic number, because the mean of its divisors is an integer number (2737800).

Almost surely, 2^42112312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42112312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43804800).

42112312 is an abundant number, since it is smaller than the sum of its proper divisors (45497288).

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

42112312 is a wasteful number, since it uses less digits than its factorization.

42112312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8187 (or 8183 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 42112312 is about 6489.3999722625. The cubic root of 42112312 is about 347.9122295935.

Adding to 42112312 its reverse (21321124), we get a palindrome (63433436).

It can be divided in two parts, 42112 and 312, that added together give a palindrome (42424).

The spelling of 42112312 in words is "forty-two million, one hundred twelve thousand, three hundred twelve".