12009541 has 2 divisors, whose sum is σ = 12009542. Its totient is φ = 12009540.

The previous prime is 12009523. The next prime is 12009551. The reversal of 12009541 is 14590021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8678916 + 3330625 = 2946^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 12009541 - 2¹³ = 12001349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12009521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6004770 + 6004771.

It is an arithmetic number, because the mean of its divisors is an integer number (6004771).

Almost surely, 2^12009541 is an apocalyptic number.

It is an amenable number.

12009541 is a deficient number, since it is larger than the sum of its proper divisors (1).

12009541 is an equidigital number, since it uses as much as digits as its factorization.

12009541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12009541 is about 3465.4784662439. The cubic root of 12009541 is about 229.0035086513.

Adding to 12009541 its reverse (14590021), we get a palindrome (26599562).

The spelling of 12009541 in words is "twelve million, nine thousand, five hundred forty-one".