1365563 has 2 divisors, whose sum is σ = 1365564. Its totient is φ = 1365562.

The previous prime is 1365557. The next prime is 1365571. The reversal of 1365563 is 3655631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1365563 - 2⁴ = 1365547 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1365503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682781 + 682782.

It is an arithmetic number, because the mean of its divisors is an integer number (682782).

2^1365563 is an apocalyptic number.

1365563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1365563 is an equidigital number, since it uses as much as digits as its factorization.

1365563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 29.

The square root of 1365563 is about 1168.5730614728. The cubic root of 1365563 is about 110.9440239369.

The spelling of 1365563 in words is "one million, three hundred sixty-five thousand, five hundred sixty-three".