1056643 has 8 divisors (see below), whose sum is σ = 1260288. Its totient is φ = 866184.

The previous prime is 1056641. The next prime is 1056659. The reversal of 1056643 is 3466501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1056643 - 2¹ = 1056641 is a prime.

It is a super-2 number, since 2×1056643² = 2232988858898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3121 + ... + 3442.

It is an arithmetic number, because the mean of its divisors is an integer number (157536).

2^1056643 is an apocalyptic number.

1056643 is a deficient number, since it is larger than the sum of its proper divisors (203645).

1056643 is an equidigital number, since it uses as much as digits as its factorization.

1056643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1056643 is about 1027.9314179458. The cubic root of 1056643 is about 101.8535319286.

It can be divided in two parts, 10566 and 43, that added together give a square (10609 = 103²).

The spelling of 1056643 in words is "one million, fifty-six thousand, six hundred forty-three".