1322921 has 2 divisors, whose sum is σ = 1322922. Its totient is φ = 1322920.

The previous prime is 1322917. The next prime is 1322927. The reversal of 1322921 is 1292231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1297321 + 25600 = 1139^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322921 - 2² = 1322917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1322893 and 1322902.

It is not a weakly prime, because it can be changed into another prime (1322927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661460 + 661461.

It is an arithmetic number, because the mean of its divisors is an integer number (661461).

2^1322921 is an apocalyptic number.

It is an amenable number.

1322921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322921 is an equidigital number, since it uses as much as digits as its factorization.

1322921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 1322921 is about 1150.1830289132. The cubic root of 1322921 is about 109.7769861842.

The spelling of 1322921 in words is "one million, three hundred twenty-two thousand, nine hundred twenty-one".