42822785 has 4 divisors (see below), whose sum is σ = 51387348. Its totient is φ = 34258224.

The previous prime is 42822761. The next prime is 42822799. The reversal of 42822785 is 58722824.

It is a happy number.

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 23541904 + 19280881 = 4852^2 + 4391^2 .

It is a cyclic number.

It is not a de Polignac number, because 42822785 - 2⁸ = 42822529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4282274 + ... + 4282283.

It is an arithmetic number, because the mean of its divisors is an integer number (12846837).

Almost surely, 2^42822785 is an apocalyptic number.

It is an amenable number.

42822785 is a deficient number, since it is larger than the sum of its proper divisors (8564563).

42822785 is an equidigital number, since it uses as much as digits as its factorization.

42822785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8564562.

The product of its digits is 71680, while the sum is 38.

The square root of 42822785 is about 6543.9120562550. The cubic root of 42822785 is about 349.8578606506.

The spelling of 42822785 in words is "forty-two million, eight hundred twenty-two thousand, seven hundred eighty-five".