1004561 has 2 divisors, whose sum is σ = 1004562. Its totient is φ = 1004560.

The previous prime is 1004551. The next prime is 1004567. The reversal of 1004561 is 1654001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 844561 + 160000 = 919^2 + 400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1004561 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (1004567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502280 + 502281.

It is an arithmetic number, because the mean of its divisors is an integer number (502281).

2^1004561 is an apocalyptic number.

It is an amenable number.

1004561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004561 is an equidigital number, since it uses as much as digits as its factorization.

1004561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1004561 is about 1002.2779055731. The cubic root of 1004561 is about 100.1518027759.

Adding to 1004561 its reverse (1654001), we get a palindrome (2658562).

The spelling of 1004561 in words is "one million, four thousand, five hundred sixty-one".