42240534 has 64 divisors (see below), whose sum is σ = 104079360. Its totient is φ = 11158560.

The previous prime is 42240533. The next prime is 42240547. The reversal of 42240534 is 43504224.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42240533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33699 + ... + 34929.

It is an arithmetic number, because the mean of its divisors is an integer number (1626240).

Almost surely, 2^42240534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42240534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52039680).

42240534 is an abundant number, since it is smaller than the sum of its proper divisors (61838826).

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

42240534 is a wasteful number, since it uses less digits than its factorization.

42240534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 42240534 is about 6499.2718053640. The cubic root of 42240534 is about 348.2649752285.

Adding to 42240534 its reverse (43504224), we get a palindrome (85744758).

The spelling of 42240534 in words is "forty-two million, two hundred forty thousand, five hundred thirty-four".