42161774 has 4 divisors (see below), whose sum is σ = 63242664. Its totient is φ = 21080886.

The previous prime is 42161723. The next prime is 42161803. The reversal of 42161774 is 47716124.

42161774 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 Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42161774.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10540442 + ... + 10540445.

It is an arithmetic number, because the mean of its divisors is an integer number (15810666).

Almost surely, 2^42161774 is an apocalyptic number.

42161774 is a deficient number, since it is larger than the sum of its proper divisors (21080890).

42161774 is a wasteful number, since it uses less digits than its factorization.

42161774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21080889.

The product of its digits is 9408, while the sum is 32.

The square root of 42161774 is about 6493.2098379769. The cubic root of 42161774 is about 348.0483869390.

Adding to 42161774 its reverse (47716124), we get a palindrome (89877898).

The spelling of 42161774 in words is "forty-two million, one hundred sixty-one thousand, seven hundred seventy-four".