12001261 has 2 divisors, whose sum is σ = 12001262. Its totient is φ = 12001260.

The previous prime is 12001211. The next prime is 12001271. The reversal of 12001261 is 16210021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 1012036 = 3315^2 + 1006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000630 + 6000631.

It is an arithmetic number, because the mean of its divisors is an integer number (6000631).

Almost surely, 2^12001261 is an apocalyptic number.

It is an amenable number.

12001261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001261 is an equidigital number, since it uses as much as digits as its factorization.

12001261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 12001261 is about 3464.2836200288. The cubic root of 12001261 is about 228.9508675890.

Adding to 12001261 its reverse (16210021), we get a palindrome (28211282).

The spelling of 12001261 in words is "twelve million, one thousand, two hundred sixty-one".