3212981 has 2 divisors, whose sum is σ = 3212982. Its totient is φ = 3212980.

The previous prime is 3212977. The next prime is 3213011. The reversal of 3212981 is 1892123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2588881 + 624100 = 1609^2 + 790^2 .

It is an emirp because it is prime and its reverse (1892123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3212981 - 2² = 3212977 is a prime.

It is a super-2 number, since 2×3212981² = 20646493812722, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 3212981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3212971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606490 + 1606491.

It is an arithmetic number, because the mean of its divisors is an integer number (1606491).

Almost surely, 2^3212981 is an apocalyptic number.

It is an amenable number.

3212981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3212981 is an equidigital number, since it uses as much as digits as its factorization.

3212981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 3212981 is about 1792.4790096400. The cubic root of 3212981 is about 147.5602511679.

The spelling of 3212981 in words is "three million, two hundred twelve thousand, nine hundred eighty-one".