1218449 has 2 divisors, whose sum is σ = 1218450. Its totient is φ = 1218448.

The previous prime is 1218433. The next prime is 1218457. The reversal of 1218449 is 9448121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 819025 + 399424 = 905^2 + 632^2 .

It is a cyclic number.

It is not a de Polignac number, because 1218449 - 2⁴ = 1218433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1218649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609224 + 609225.

It is an arithmetic number, because the mean of its divisors is an integer number (609225).

2^1218449 is an apocalyptic number.

It is an amenable number.

1218449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218449 is an equidigital number, since it uses as much as digits as its factorization.

1218449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 1218449 is about 1103.8337737178. The cubic root of 1218449 is about 106.8076726756.

The spelling of 1218449 in words is "one million, two hundred eighteen thousand, four hundred forty-nine".