1356647 has 2 divisors, whose sum is σ = 1356648. Its totient is φ = 1356646.

The previous prime is 1356643. The next prime is 1356659. The reversal of 1356647 is 7466531.

It is a weak prime.

It is an emirp because it is prime and its reverse (7466531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1356647 - 2² = 1356643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678323 + 678324.

It is an arithmetic number, because the mean of its divisors is an integer number (678324).

2^1356647 is an apocalyptic number.

1356647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356647 is an equidigital number, since it uses as much as digits as its factorization.

1356647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 1356647 is about 1164.7519049137. The cubic root of 1356647 is about 110.7020388614.

The spelling of 1356647 in words is "one million, three hundred fifty-six thousand, six hundred forty-seven".