1395643 has 2 divisors, whose sum is σ = 1395644. Its totient is φ = 1395642.

The previous prime is 1395629. The next prime is 1395659. The reversal of 1395643 is 3465931.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1395643 is a prime.

1395643 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1395613) 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, 697821 + 697822.

It is an arithmetic number, because the mean of its divisors is an integer number (697822).

2^1395643 is an apocalyptic number.

1395643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395643 is an equidigital number, since it uses as much as digits as its factorization.

1395643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 31.

The square root of 1395643 is about 1181.3733533477. The cubic root of 1395643 is about 111.7527229508.

The spelling of 1395643 in words is "one million, three hundred ninety-five thousand, six hundred forty-three".