8144561 has 2 divisors, whose sum is σ = 8144562. Its totient is φ = 8144560.

The previous prime is 8144557. The next prime is 8144567. The reversal of 8144561 is 1654418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8065600 + 78961 = 2840^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 8144561 - 2² = 8144557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₅₄₈₈₁₃ and since 8144561 and 548813 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (8144567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4072280 + 4072281.

It is an arithmetic number, because the mean of its divisors is an integer number (4072281).

Almost surely, 2^8144561 is an apocalyptic number.

It is an amenable number.

8144561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8144561 is an equidigital number, since it uses as much as digits as its factorization.

8144561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 29.

The square root of 8144561 is about 2853.8677264372. The cubic root of 8144561 is about 201.1974907694.

Adding to 8144561 its reverse (1654418), we get a palindrome (9798979).

The spelling of 8144561 in words is "eight million, one hundred forty-four thousand, five hundred sixty-one".