42009504 has 48 divisors (see below), whose sum is σ = 113264928. Its totient is φ = 13623552.

The previous prime is 42009491. The next prime is 42009509. The reversal of 42009504 is 40590024.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (42009509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2362 + ... + 9465.

It is an arithmetic number, because the mean of its divisors is an integer number (2359686).

Almost surely, 2^42009504 is an apocalyptic number.

It is an amenable number.

42009504 is an abundant number, since it is smaller than the sum of its proper divisors (71255424).

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

42009504 is a wasteful number, since it uses less digits than its factorization.

42009504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11877 (or 11869 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 42009504 is about 6481.4739064506. The cubic root of 42009504 is about 347.6288816836.

Adding to 42009504 its reverse (40590024), we get a palindrome (82599528).

The spelling of 42009504 in words is "forty-two million, nine thousand, five hundred four".