1395663 has 16 divisors (see below), whose sum is σ = 1969920. Its totient is φ = 877184.

The previous prime is 1395661. The next prime is 1395671. The reversal of 1395663 is 3665931.

It is a cyclic number.

It is not a de Polignac number, because 1395663 - 2¹ = 1395661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1395661) 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 in 15 ways as a sum of consecutive naturals, for example, 7708 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

2^1395663 is an apocalyptic number.

1395663 is a deficient number, since it is larger than the sum of its proper divisors (574257).

1395663 is a wasteful number, since it uses less digits than its factorization.

1395663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

The product of its digits is 14580, while the sum is 33.

The square root of 1395663 is about 1181.3818180419. The cubic root of 1395663 is about 111.7532567654.

The spelling of 1395663 in words is "one million, three hundred ninety-five thousand, six hundred sixty-three".