42541685 has 4 divisors (see below), whose sum is σ = 51050028. Its totient is φ = 34033344.

The previous prime is 42541679. The next prime is 42541687. The reversal of 42541685 is 58614524.

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 7091569 + 35450116 = 2663^2 + 5954^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42541685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42541687) by changing a digit.

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, 4254164 + ... + 4254173.

It is an arithmetic number, because the mean of its divisors is an integer number (12762507).

Almost surely, 2^42541685 is an apocalyptic number.

It is an amenable number.

42541685 is a deficient number, since it is larger than the sum of its proper divisors (8508343).

42541685 is an equidigital number, since it uses as much as digits as its factorization.

42541685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8508342.

The product of its digits is 38400, while the sum is 35.

The square root of 42541685 is about 6522.3987151967. The cubic root of 42541685 is about 349.0906598844.

The spelling of 42541685 in words is "forty-two million, five hundred forty-one thousand, six hundred eighty-five".