12040261 has 2 divisors, whose sum is σ = 12040262. Its totient is φ = 12040260.

The previous prime is 12040253. The next prime is 12040271. The reversal of 12040261 is 16204021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11390625 + 649636 = 3375^2 + 806^2 .

It is an emirp because it is prime and its reverse (16204021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12040261 - 2³ = 12040253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12040211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6020130 + 6020131.

It is an arithmetic number, because the mean of its divisors is an integer number (6020131).

Almost surely, 2^12040261 is an apocalyptic number.

It is an amenable number.

12040261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12040261 is an equidigital number, since it uses as much as digits as its factorization.

12040261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 12040261 is about 3469.9079238504. The cubic root of 12040261 is about 229.1986034756.

Adding to 12040261 its reverse (16204021), we get a palindrome (28244282).

The spelling of 12040261 in words is "twelve million, forty thousand, two hundred sixty-one".