1355309 has 2 divisors, whose sum is σ = 1355310. Its totient is φ = 1355308.

The previous prime is 1355303. The next prime is 1355311. The reversal of 1355309 is 9035531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 178084 = 1085^2 + 422^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355309 - 2⁴ = 1355293 is a prime.

Together with 1355311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677654 + 677655.

It is an arithmetic number, because the mean of its divisors is an integer number (677655).

2^1355309 is an apocalyptic number.

It is an amenable number.

1355309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355309 is an equidigital number, since it uses as much as digits as its factorization.

1355309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2025, while the sum is 26.

The square root of 1355309 is about 1164.1773919811. The cubic root of 1355309 is about 110.6656334076.

The spelling of 1355309 in words is "one million, three hundred fifty-five thousand, three hundred nine".