1355647 has 2 divisors, whose sum is σ = 1355648. Its totient is φ = 1355646.

The previous prime is 1355623. The next prime is 1355657. The reversal of 1355647 is 7465531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677823 + 677824.

It is an arithmetic number, because the mean of its divisors is an integer number (677824).

2^1355647 is an apocalyptic number.

1355647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355647 is an equidigital number, since it uses as much as digits as its factorization.

1355647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 1355647 is about 1164.3225498117. The cubic root of 1355647 is about 110.6748322631.

It can be divided in two parts, 1355 and 647, that added together give a palindrome (2002).

The spelling of 1355647 in words is "one million, three hundred fifty-five thousand, six hundred forty-seven".