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1043 = 7149
BaseRepresentation
bin10000010011
31102122
4100103
513133
64455
73020
oct2023
91378
101043
11869
1272b
13623
14547
15498
hex413

1043 has 4 divisors (see below), whose sum is σ = 1200. Its totient is φ = 888.

The previous prime is 1039. The next prime is 1049. The reversal of 1043 is 3401.

Adding to 1043 its reverse (3401), we get a palindrome (4444).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3401 = 19179.

It is a cyclic number.

It is not a de Polignac number, because 1043 - 22 = 1039 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6 and base 9.

It is a zygodrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 1043.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 1043.

It is not an unprimeable number, because it can be changed into a prime (1049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68 + ... + 81.

It is an arithmetic number, because the mean of its divisors is an integer number (300).

1043 is a deficient number, since it is larger than the sum of its proper divisors (157).

1043 is an equidigital number, since it uses as much as digits as its factorization.

1043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 1043 is about 32.2955105239. The cubic root of 1043 is about 10.1413266033.

The spelling of 1043 in words is "one thousand, forty-three", and thus it is an iban number.

Divisors: 1 7 149 1043