42725885 has 4 divisors (see below), whose sum is σ = 51271068. Its totient is φ = 34180704.

The previous prime is 42725863. The next prime is 42725911. The reversal of 42725885 is 58852724.

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 16736281 + 25989604 = 4091^2 + 5098^2 .

It is a cyclic number.

It is not a de Polignac number, because 42725885 - 2⁶ = 42725821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4272584 + ... + 4272593.

It is an arithmetic number, because the mean of its divisors is an integer number (12817767).

Almost surely, 2^42725885 is an apocalyptic number.

It is an amenable number.

42725885 is a deficient number, since it is larger than the sum of its proper divisors (8545183).

42725885 is an equidigital number, since it uses as much as digits as its factorization.

42725885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545182.

The product of its digits is 179200, while the sum is 41.

The square root of 42725885 is about 6536.5040350328. The cubic root of 42725885 is about 349.5937735950.

The spelling of 42725885 in words is "forty-two million, seven hundred twenty-five thousand, eight hundred eighty-five".