8241561 has 8 divisors (see below), whose sum is σ = 12209760. Its totient is φ = 5494356.

The previous prime is 8241559. The next prime is 8241577. The reversal of 8241561 is 1651428.

It is not a de Polignac number, because 8241561 - 2¹ = 8241559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 305243 = 8241561 / (8 + 2 + 4 + 1 + 5 + 6 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8241511) 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 7 ways as a sum of consecutive naturals, for example, 152595 + ... + 152648.

It is an arithmetic number, because the mean of its divisors is an integer number (1526220).

Almost surely, 2^8241561 is an apocalyptic number.

It is an amenable number.

8241561 is a deficient number, since it is larger than the sum of its proper divisors (3968199).

8241561 is a wasteful number, since it uses less digits than its factorization.

8241561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305252 (or 305246 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 8241561 is about 2870.8119060642. The cubic root of 8241561 is about 201.9930805067.

Adding to 8241561 its reverse (1651428), we get a palindrome (9892989).

The spelling of 8241561 in words is "eight million, two hundred forty-one thousand, five hundred sixty-one".