42509446 has 16 divisors (see below), whose sum is σ = 73753344. Its totient is φ = 17998344.

The previous prime is 42509443. The next prime is 42509459. The reversal of 42509446 is 64490524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42509443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17130 + ... + 19453.

It is an arithmetic number, because the mean of its divisors is an integer number (4609584).

Almost surely, 2^42509446 is an apocalyptic number.

42509446 is a deficient number, since it is larger than the sum of its proper divisors (31243898).

42509446 is a wasteful number, since it uses less digits than its factorization.

42509446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36675.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 42509446 is about 6519.9268400803. The cubic root of 42509446 is about 349.0024548066.

The spelling of 42509446 in words is "forty-two million, five hundred nine thousand, four hundred forty-six".