1063643 has 10 divisors (see below), whose sum is σ = 1243644. Its totient is φ = 909636.

The previous prime is 1063637. The next prime is 1063649. The reversal of 1063643 is 3463601.

It is an interprime number because it is at equal distance from previous prime (1063637) and next prime (1063649).

It is not a de Polignac number, because 1063643 - 2⁴ = 1063627 is a prime.

It is a super-2 number, since 2×1063643² = 2262672862898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1063649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2180 + ... + 2622.

2^1063643 is an apocalyptic number.

1063643 is a deficient number, since it is larger than the sum of its proper divisors (180001).

1063643 is an frugal number, since it uses more digits than its factorization.

1063643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1063643 is about 1031.3306938126. The cubic root of 1063643 is about 102.0779552722.

The spelling of 1063643 in words is "one million, sixty-three thousand, six hundred forty-three".