9404561 has 2 divisors, whose sum is σ = 9404562. Its totient is φ = 9404560.

The previous prime is 9404537. The next prime is 9404567. The reversal of 9404561 is 1654049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7595536 + 1809025 = 2756^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 9404561 - 2¹⁴ = 9388177 is a prime.

It is not a weakly prime, because it can be changed into another prime (9404567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4702280 + 4702281.

It is an arithmetic number, because the mean of its divisors is an integer number (4702281).

Almost surely, 2^9404561 is an apocalyptic number.

It is an amenable number.

9404561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9404561 is an equidigital number, since it uses as much as digits as its factorization.

9404561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 9404561 is about 3066.6856702310. The cubic root of 9404561 is about 211.0795579086.

The spelling of 9404561 in words is "nine million, four hundred four thousand, five hundred sixty-one".