42104540 has 24 divisors (see below), whose sum is σ = 90577872. Its totient is φ = 16430720.

The previous prime is 42104539. The next prime is 42104593. The reversal of 42104540 is 4540124.

42104540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42104540² = 3545584577223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24854 + ... + 26493.

It is an arithmetic number, because the mean of its divisors is an integer number (3774078).

Almost surely, 2^42104540 is an apocalyptic number.

It is an amenable number.

42104540 is an abundant number, since it is smaller than the sum of its proper divisors (48473332).

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

42104540 is a wasteful number, since it uses less digits than its factorization.

42104540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51397 (or 51395 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 42104540 is about 6488.8011219331. The cubic root of 42104540 is about 347.8908254001.

Adding to 42104540 its reverse (4540124), we get a palindrome (46644664).

The spelling of 42104540 in words is "forty-two million, one hundred four thousand, five hundred forty".