42705030 has 64 divisors (see below), whose sum is σ = 106813440. Its totient is φ = 10917504.

The previous prime is 42705029. The next prime is 42705049. The reversal of 42705030 is 3050724.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42704988 and 42705006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87447 + ... + 87933.

It is an arithmetic number, because the mean of its divisors is an integer number (1668960).

Almost surely, 2^42705030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42705030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53406720).

42705030 is an abundant number, since it is smaller than the sum of its proper divisors (64108410).

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

42705030 is a wasteful number, since it uses less digits than its factorization.

42705030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 42705030 is about 6534.9085686029. The cubic root of 42705030 is about 349.5368840793.

Adding to 42705030 its reverse (3050724), we get a palindrome (45755754).

The spelling of 42705030 in words is "forty-two million, seven hundred five thousand, thirty".