4242161 has 16 divisors (see below), whose sum is σ = 5435520. Its totient is φ = 3214080.

The previous prime is 4242137. The next prime is 4242167. The reversal of 4242161 is 1612424.

4242161 = 616² + 617² + ... + 626².

It is a cyclic number.

It is not a de Polignac number, because 4242161 - 2¹⁸ = 3980017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4242167) 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 15 ways as a sum of consecutive naturals, for example, 2105 + ... + 3593.

It is an arithmetic number, because the mean of its divisors is an integer number (339720).

Almost surely, 2^4242161 is an apocalyptic number.

It is an amenable number.

4242161 is a deficient number, since it is larger than the sum of its proper divisors (1193359).

4242161 is a wasteful number, since it uses less digits than its factorization.

4242161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544.

The product of its digits is 384, while the sum is 20.

The square root of 4242161 is about 2059.6506985409. The cubic root of 4242161 is about 161.8809392930.

Adding to 4242161 its reverse (1612424), we get a palindrome (5854585).

The spelling of 4242161 in words is "four million, two hundred forty-two thousand, one hundred sixty-one".