4242561 has 8 divisors (see below), whose sum is σ = 5666304. Its totient is φ = 2823600.

The previous prime is 4242551. The next prime is 4242569. The reversal of 4242561 is 1652424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4242561 - 2¹¹ = 4240513 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

4242561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4242569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611 + ... + 3911.

It is an arithmetic number, because the mean of its divisors is an integer number (708288).

Almost surely, 2^4242561 is an apocalyptic number.

It is an amenable number.

4242561 is a deficient number, since it is larger than the sum of its proper divisors (1423743).

4242561 is a wasteful number, since it uses less digits than its factorization.

4242561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391.

The product of its digits is 1920, while the sum is 24.

The square root of 4242561 is about 2059.7478000959. The cubic root of 4242561 is about 161.8860271355.

Adding to 4242561 its reverse (1652424), we get a palindrome (5894985).

It can be divided in two parts, 42425 and 61, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 4242561 in words is "four million, two hundred forty-two thousand, five hundred sixty-one".