42241985 has 4 divisors (see below), whose sum is σ = 50690388. Its totient is φ = 33793584.

The previous prime is 42241967. The next prime is 42241987. The reversal of 42241985 is 58914224.

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 16313521 + 25928464 = 4039^2 + 5092^2 .

It is a cyclic number.

It is not a de Polignac number, because 42241985 - 2¹⁸ = 41979841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42241987) 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, 4224194 + ... + 4224203.

It is an arithmetic number, because the mean of its divisors is an integer number (12672597).

Almost surely, 2^42241985 is an apocalyptic number.

It is an amenable number.

42241985 is a deficient number, since it is larger than the sum of its proper divisors (8448403).

42241985 is an equidigital number, since it uses as much as digits as its factorization.

42241985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8448402.

The product of its digits is 23040, while the sum is 35.

The square root of 42241985 is about 6499.3834322957. The cubic root of 42241985 is about 348.2689629203.

The spelling of 42241985 in words is "forty-two million, two hundred forty-one thousand, nine hundred eighty-five".