42819305 has 4 divisors (see below), whose sum is σ = 51383172. Its totient is φ = 34255440.

The previous prime is 42819289. The next prime is 42819317. The reversal of 42819305 is 50391824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29888089 + 12931216 = 5467^2 + 3596^2 .

It is not a de Polignac number, because 42819305 - 2⁴ = 42819289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4281926 + ... + 4281935.

It is an arithmetic number, because the mean of its divisors is an integer number (12845793).

Almost surely, 2^42819305 is an apocalyptic number.

It is an amenable number.

42819305 is a deficient number, since it is larger than the sum of its proper divisors (8563867).

42819305 is an equidigital number, since it uses as much as digits as its factorization.

42819305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8563866.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 42819305 is about 6543.6461548589. The cubic root of 42819305 is about 349.8483833102.

The spelling of 42819305 in words is "forty-two million, eight hundred nineteen thousand, three hundred five".