1233409 has 2 divisors, whose sum is σ = 1233410. Its totient is φ = 1233408.

The previous prime is 1233377. The next prime is 1233431. The reversal of 1233409 is 9043321.

It is an a-pointer prime, because the next prime (1233431) can be obtained adding 1233409 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 23409 = 1100^2 + 153^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233409 - 2⁵ = 1233377 is a prime.

It is a super-2 number, since 2×1233409² = 3042595522562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1233409.

It is not a weakly prime, because it can be changed into another prime (1233439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616704 + 616705.

It is an arithmetic number, because the mean of its divisors is an integer number (616705).

2^1233409 is an apocalyptic number.

It is an amenable number.

1233409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233409 is an equidigital number, since it uses as much as digits as its factorization.

1233409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1233409 is about 1110.5894831125. The cubic root of 1233409 is about 107.2430205755.

The spelling of 1233409 in words is "one million, two hundred thirty-three thousand, four hundred nine".