12010861 has 2 divisors, whose sum is σ = 12010862. Its totient is φ = 12010860.

The previous prime is 12010849. The next prime is 12010877. The reversal of 12010861 is 16801021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9418761 + 2592100 = 3069^2 + 1610^2 .

It is a cyclic number.

It is not a de Polignac number, because 12010861 - 2²³ = 3622253 is a prime.

It is a super-2 number, since 2×12010861² = 288521563922642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12010841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005430 + 6005431.

It is an arithmetic number, because the mean of its divisors is an integer number (6005431).

Almost surely, 2^12010861 is an apocalyptic number.

It is an amenable number.

12010861 is a deficient number, since it is larger than the sum of its proper divisors (1).

12010861 is an equidigital number, since it uses as much as digits as its factorization.

12010861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 12010861 is about 3465.6689109031. The cubic root of 12010861 is about 229.0118984684.

Adding to 12010861 its reverse (16801021), we get a palindrome (28811882).

The spelling of 12010861 in words is "twelve million, ten thousand, eight hundred sixty-one".