3212861 has 2 divisors, whose sum is σ = 3212862. Its totient is φ = 3212860.

The previous prime is 3212857. The next prime is 3212863. The reversal of 3212861 is 1682123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2992900 + 219961 = 1730^2 + 469^2 .

It is an emirp because it is prime and its reverse (1682123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3212861 - 2² = 3212857 is a prime.

Together with 3212863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3212863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606430 + 1606431.

It is an arithmetic number, because the mean of its divisors is an integer number (1606431).

Almost surely, 2^3212861 is an apocalyptic number.

It is an amenable number.

3212861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3212861 is an equidigital number, since it uses as much as digits as its factorization.

3212861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 3212861 is about 1792.4455361321. The cubic root of 3212861 is about 147.5584140940.

Adding to 3212861 its reverse (1682123), we get a palindrome (4894984).

The spelling of 3212861 in words is "three million, two hundred twelve thousand, eight hundred sixty-one".