42648845 has 4 divisors (see below), whose sum is σ = 51178620. Its totient is φ = 34119072.

The previous prime is 42648829. The next prime is 42648871. The reversal of 42648845 is 54884624.

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 28526281 + 14122564 = 5341^2 + 3758^2 .

It is a cyclic number.

It is not a de Polignac number, because 42648845 - 2⁴ = 42648829 is a prime.

It is a congruent 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, 4264880 + ... + 4264889.

It is an arithmetic number, because the mean of its divisors is an integer number (12794655).

Almost surely, 2^42648845 is an apocalyptic number.

It is an amenable number.

42648845 is a deficient number, since it is larger than the sum of its proper divisors (8529775).

42648845 is an equidigital number, since it uses as much as digits as its factorization.

42648845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529774.

The product of its digits is 245760, while the sum is 41.

The square root of 42648845 is about 6530.6083177603. The cubic root of 42648845 is about 349.3835270570.

The spelling of 42648845 in words is "forty-two million, six hundred forty-eight thousand, eight hundred forty-five".