1222681 has 2 divisors, whose sum is σ = 1222682. Its totient is φ = 1222680.

The previous prime is 1222679. The next prime is 1222693. The reversal of 1222681 is 1862221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1190281 + 32400 = 1091^2 + 180^2 .

It is an emirp because it is prime and its reverse (1862221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222681 - 2¹ = 1222679 is a prime.

It is a super-2 number, since 2×1222681² = 2989897655522, which contains 22 as substring.

Together with 1222679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1222601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611340 + 611341.

It is an arithmetic number, because the mean of its divisors is an integer number (611341).

2^1222681 is an apocalyptic number.

It is an amenable number.

1222681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222681 is an equidigital number, since it uses as much as digits as its factorization.

1222681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 22.

The square root of 1222681 is about 1105.7490673747. The cubic root of 1222681 is about 106.9311870125.

The spelling of 1222681 in words is "one million, two hundred twenty-two thousand, six hundred eighty-one".