1221449 has 2 divisors, whose sum is σ = 1221450. Its totient is φ = 1221448.

The previous prime is 1221443. The next prime is 1221457. The reversal of 1221449 is 9441221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 11449 = 1100^2 + 107^2 .

It is an emirp because it is prime and its reverse (9441221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221449 - 2⁸ = 1221193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610724 + 610725.

It is an arithmetic number, because the mean of its divisors is an integer number (610725).

2^1221449 is an apocalyptic number.

It is an amenable number.

1221449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221449 is an equidigital number, since it uses as much as digits as its factorization.

1221449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 1221449 is about 1105.1918385511. The cubic root of 1221449 is about 106.8952595452.

The spelling of 1221449 in words is "one million, two hundred twenty-one thousand, four hundred forty-nine".