1210409 has 2 divisors, whose sum is σ = 1210410. Its totient is φ = 1210408.

The previous prime is 1210403. The next prime is 1210411. The reversal of 1210409 is 9040121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896809 + 313600 = 947^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210409 - 2⁴ = 1210393 is a prime.

Together with 1210411, 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 (1210403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605204 + 605205.

It is an arithmetic number, because the mean of its divisors is an integer number (605205).

2^1210409 is an apocalyptic number.

It is an amenable number.

1210409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210409 is an equidigital number, since it uses as much as digits as its factorization.

1210409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1210409 is about 1100.1858933835. The cubic root of 1210409 is about 106.5722286964.

The spelling of 1210409 in words is "one million, two hundred ten thousand, four hundred nine".