1031643 has 16 divisors (see below), whose sum is σ = 1609600. Its totient is φ = 651240.

The previous prime is 1031633. The next prime is 1031669. The reversal of 1031643 is 3461301.

It is not a de Polignac number, because 1031643 - 2¹⁰ = 1030619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493 + ... + 1518.

It is an arithmetic number, because the mean of its divisors is an integer number (100600).

2^1031643 is an apocalyptic number.

1031643 is a deficient number, since it is larger than the sum of its proper divisors (577957).

1031643 is a wasteful number, since it uses less digits than its factorization.

1031643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039 (or 2033 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1031643 is about 1015.6982819716. The cubic root of 1031643 is about 101.0438328842.

Adding to 1031643 its reverse (3461301), we get a palindrome (4492944).

The spelling of 1031643 in words is "one million, thirty-one thousand, six hundred forty-three".