42742812 has 48 divisors (see below), whose sum is σ = 114598400. Its totient is φ = 12146112.

The previous prime is 42742793. The next prime is 42742813. The reversal of 42742812 is 21824724.

It is a self number, because there is not a number n which added to its sum of digits gives 42742812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42742813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15438 + ... + 17994.

Almost surely, 2^42742812 is an apocalyptic number.

42742812 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42742812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57299200).

42742812 is an abundant number, since it is smaller than the sum of its proper divisors (71855588).

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

42742812 is a wasteful number, since it uses less digits than its factorization.

42742812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770 (or 2768 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 42742812 is about 6537.7987121049. The cubic root of 42742812 is about 349.6399344684.

The spelling of 42742812 in words is "forty-two million, seven hundred forty-two thousand, eight hundred twelve".