1220893 has 2 divisors, whose sum is σ = 1220894. Its totient is φ = 1220892.

The previous prime is 1220839. The next prime is 1220897. The reversal of 1220893 is 3980221.

Together with previous prime (1220839) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1194649 + 26244 = 1093^2 + 162^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610446 + 610447.

It is an arithmetic number, because the mean of its divisors is an integer number (610447).

2^1220893 is an apocalyptic number.

It is an amenable number.

1220893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220893 is an equidigital number, since it uses as much as digits as its factorization.

1220893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1220893 is about 1104.9402698789. The cubic root of 1220893 is about 106.8790376141.

The spelling of 1220893 in words is "one million, two hundred twenty thousand, eight hundred ninety-three".