42109542 has 24 divisors (see below), whose sum is σ = 93464280. Its totient is φ = 13693920.

The previous prime is 42109531. The next prime is 42109547. The reversal of 42109542 is 24590124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42109547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27792 + ... + 29267.

It is an arithmetic number, because the mean of its divisors is an integer number (3894345).

Almost surely, 2^42109542 is an apocalyptic number.

42109542 is an abundant number, since it is smaller than the sum of its proper divisors (51354738).

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

42109542 is a wasteful number, since it uses less digits than its factorization.

42109542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57108 (or 57105 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 42109542 is about 6489.1865437819. The cubic root of 42109542 is about 347.9046012780.

Adding to 42109542 its reverse (24590124), we get a palindrome (66699666).

The spelling of 42109542 in words is "forty-two million, one hundred nine thousand, five hundred forty-two".