12061681 has 2 divisors, whose sum is σ = 12061682. Its totient is φ = 12061680.

The previous prime is 12061663. The next prime is 12061703. The reversal of 12061681 is 18616021.

12061681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8317456 + 3744225 = 2884^2 + 1935^2 .

It is a cyclic number.

It is not a de Polignac number, because 12061681 - 2⁵ = 12061649 is a prime.

It is a super-4 number, since 4×12061681⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (12061661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6030840 + 6030841.

It is an arithmetic number, because the mean of its divisors is an integer number (6030841).

Almost surely, 2^12061681 is an apocalyptic number.

It is an amenable number.

12061681 is a deficient number, since it is larger than the sum of its proper divisors (1).

12061681 is an equidigital number, since it uses as much as digits as its factorization.

12061681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12061681 is about 3472.9930895411. The cubic root of 12061681 is about 229.3344401106.

The spelling of 12061681 in words is "twelve million, sixty-one thousand, six hundred eighty-one".