42161611 has 4 divisors (see below), whose sum is σ = 43301152. Its totient is φ = 41022072.

The previous prime is 42161591. The next prime is 42161617. The reversal of 42161611 is 11616124.

42161611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42161611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42161617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569715 + ... + 569788.

It is an arithmetic number, because the mean of its divisors is an integer number (10825288).

Almost surely, 2^42161611 is an apocalyptic number.

42161611 is a deficient number, since it is larger than the sum of its proper divisors (1139541).

42161611 is a wasteful number, since it uses less digits than its factorization.

42161611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139540.

The product of its digits is 288, while the sum is 22.

The square root of 42161611 is about 6493.1972863914. The cubic root of 42161611 is about 348.0479384129.

Adding to 42161611 its reverse (11616124), we get a palindrome (53777735).

It can be divided in two parts, 4216 and 1611, that multiplied together give a palindrome (6791976).

The spelling of 42161611 in words is "forty-two million, one hundred sixty-one thousand, six hundred eleven".