1226609 has 2 divisors, whose sum is σ = 1226610. Its totient is φ = 1226608.

The previous prime is 1226593. The next prime is 1226611. The reversal of 1226609 is 9066221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1216609 + 10000 = 1103^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226609 - 2⁴ = 1226593 is a prime.

Together with 1226611, 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 (1226629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613304 + 613305.

It is an arithmetic number, because the mean of its divisors is an integer number (613305).

2^1226609 is an apocalyptic number.

It is an amenable number.

1226609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226609 is an equidigital number, since it uses as much as digits as its factorization.

1226609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1226609 is about 1107.5238146424. The cubic root of 1226609 is about 107.0455740877.

The spelling of 1226609 in words is "one million, two hundred twenty-six thousand, six hundred nine".