1283503 has 4 divisors (see below), whose sum is σ = 1382248. Its totient is φ = 1184760.

The previous prime is 1283479. The next prime is 1283509. The reversal of 1283503 is 3053821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1283503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283509) 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 3 ways as a sum of consecutive naturals, for example, 49353 + ... + 49378.

It is an arithmetic number, because the mean of its divisors is an integer number (345562).

2^1283503 is an apocalyptic number.

1283503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1283503 is a deficient number, since it is larger than the sum of its proper divisors (98745).

1283503 is an equidigital number, since it uses as much as digits as its factorization.

1283503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98744.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1283503 is about 1132.9179140609. The cubic root of 1283503 is about 108.6756624133.

The spelling of 1283503 in words is "one million, two hundred eighty-three thousand, five hundred three".