42904481 has 8 divisors (see below), whose sum is σ = 45569160. Its totient is φ = 40255488.

The previous prime is 42904469. The next prime is 42904487. The reversal of 42904481 is 18440924.

42904481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7203856 + 35700625 = 2684^2 + 5975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42904481 - 2¹⁰ = 42903457 is a prime.

It is a super-2 number, since 2×42904481² = 3681588979758722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42904487) by changing a digit.

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, 1985 + ... + 9473.

It is an arithmetic number, because the mean of its divisors is an integer number (5696145).

Almost surely, 2^42904481 is an apocalyptic number.

It is an amenable number.

42904481 is a deficient number, since it is larger than the sum of its proper divisors (2664679).

42904481 is a wasteful number, since it uses less digits than its factorization.

42904481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7843.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 42904481 is about 6550.1512196284. The cubic root of 42904481 is about 350.0802020286.

The spelling of 42904481 in words is "forty-two million, nine hundred four thousand, four hundred eighty-one".