1355447 has 2 divisors, whose sum is σ = 1355448. Its totient is φ = 1355446.

The previous prime is 1355443. The next prime is 1355449. The reversal of 1355447 is 7445531.

It is a strong prime.

It is an emirp because it is prime and its reverse (7445531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1355447 - 2² = 1355443 is a prime.

Together with 1355449, 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 (1355443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677723 + 677724.

It is an arithmetic number, because the mean of its divisors is an integer number (677724).

2^1355447 is an apocalyptic number.

1355447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355447 is an equidigital number, since it uses as much as digits as its factorization.

1355447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 29.

The square root of 1355447 is about 1164.2366597904. The cubic root of 1355447 is about 110.6693893380.

The spelling of 1355447 in words is "one million, three hundred fifty-five thousand, four hundred forty-seven".