1220801 has 2 divisors, whose sum is σ = 1220802. Its totient is φ = 1220800.

The previous prime is 1220797. The next prime is 1220803. The reversal of 1220801 is 1080221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1048576 + 172225 = 1024^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220801 - 2² = 1220797 is a prime.

Together with 1220803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1220803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610400 + 610401.

It is an arithmetic number, because the mean of its divisors is an integer number (610401).

2^1220801 is an apocalyptic number.

It is an amenable number.

1220801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220801 is an equidigital number, since it uses as much as digits as its factorization.

1220801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1220801 is about 1104.8986378849. The cubic root of 1220801 is about 106.8763529348.

The spelling of 1220801 in words is "one million, two hundred twenty thousand, eight hundred one".