1012643 has 8 divisors (see below), whose sum is σ = 1075200. Its totient is φ = 951048.

The previous prime is 1012637. The next prime is 1012657. The reversal of 1012643 is 3462101.

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 1012643 - 2¹² = 1008547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012633) 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 7 ways as a sum of consecutive naturals, for example, 4118 + ... + 4356.

It is an arithmetic number, because the mean of its divisors is an integer number (134400).

2^1012643 is an apocalyptic number.

1012643 is a deficient number, since it is larger than the sum of its proper divisors (62557).

1012643 is a wasteful number, since it uses less digits than its factorization.

1012643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1012643 is about 1006.3016446374. The cubic root of 1012643 is about 100.4196696435.

Adding to 1012643 its reverse (3462101), we get a palindrome (4474744).

It can be divided in two parts, 101 and 2643, that added together give a cube (2744 = 14³).

The spelling of 1012643 in words is "one million, twelve thousand, six hundred forty-three".