4120561 has 8 divisors (see below), whose sum is σ = 4273280. Its totient is φ = 3970512.

The previous prime is 4120559. The next prime is 4120573. The reversal of 4120561 is 1650214.

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

It is a cyclic number.

It is not a de Polignac number, because 4120561 - 2¹ = 4120559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4120661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2791 + ... + 4003.

It is an arithmetic number, because the mean of its divisors is an integer number (534160).

Almost surely, 2^4120561 is an apocalyptic number.

It is an amenable number.

4120561 is a deficient number, since it is larger than the sum of its proper divisors (152719).

4120561 is a wasteful number, since it uses less digits than its factorization.

4120561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 4120561 is about 2029.9165007458. The cubic root of 4120561 is about 160.3191675895.

Adding to 4120561 its reverse (1650214), we get a palindrome (5770775).

It can be divided in two parts, 41 and 20561, that added together give a palindrome (20602).

The spelling of 4120561 in words is "four million, one hundred twenty thousand, five hundred sixty-one".