8541409 has 2 divisors, whose sum is σ = 8541410. Its totient is φ = 8541408.

The previous prime is 8541397. The next prime is 8541473. The reversal of 8541409 is 9041458.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8294400 + 247009 = 2880^2 + 497^2 .

It is a cyclic number.

It is not a de Polignac number, because 8541409 - 2¹¹ = 8539361 is a prime.

It is not a weakly prime, because it can be changed into another prime (8541479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4270704 + 4270705.

It is an arithmetic number, because the mean of its divisors is an integer number (4270705).

Almost surely, 2^8541409 is an apocalyptic number.

It is an amenable number.

8541409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8541409 is an equidigital number, since it uses as much as digits as its factorization.

8541409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 8541409 is about 2922.5689042348. The cubic root of 8541409 is about 204.4136247672.

The spelling of 8541409 in words is "eight million, five hundred forty-one thousand, four hundred nine".