1221193 has 2 divisors, whose sum is σ = 1221194. Its totient is φ = 1221192.

The previous prime is 1221167. The next prime is 1221197. The reversal of 1221193 is 3911221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1054729 + 166464 = 1027^2 + 408^2 .

It is an emirp because it is prime and its reverse (3911221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221193 is a prime.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1221193.

It is not a weakly prime, because it can be changed into another prime (1221197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610596 + 610597.

It is an arithmetic number, because the mean of its divisors is an integer number (610597).

2^1221193 is an apocalyptic number.

It is an amenable number.

1221193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221193 is an equidigital number, since it uses as much as digits as its factorization.

1221193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 19.

The square root of 1221193 is about 1105.0760154849. The cubic root of 1221193 is about 106.8877910662.

The spelling of 1221193 in words is "one million, two hundred twenty-one thousand, one hundred ninety-three".