42030534 has 64 divisors (see below), whose sum is σ = 105638400. Its totient is φ = 11077920.

The previous prime is 42030533. The next prime is 42030559. The reversal of 42030534 is 43503024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42030534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42030533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25969 + ... + 27539.

It is an arithmetic number, because the mean of its divisors is an integer number (1650600).

Almost surely, 2^42030534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42030534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52819200).

42030534 is an abundant number, since it is smaller than the sum of its proper divisors (63607866).

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

42030534 is a wasteful number, since it uses less digits than its factorization.

42030534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 42030534 is about 6483.0960196499. The cubic root of 42030534 is about 347.6868797961.

Adding to 42030534 its reverse (43503024), we get a palindrome (85533558).

The spelling of 42030534 in words is "forty-two million, thirty thousand, five hundred thirty-four".