1287203 has 4 divisors (see below), whose sum is σ = 1309080. Its totient is φ = 1265328.

The previous prime is 1287199. The next prime is 1287217. The reversal of 1287203 is 3027821.

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

It is a cyclic number.

It is not a de Polignac number, because 1287203 - 2² = 1287199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287233) 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, 10850 + ... + 10967.

It is an arithmetic number, because the mean of its divisors is an integer number (327270).

2^1287203 is an apocalyptic number.

1287203 is a deficient number, since it is larger than the sum of its proper divisors (21877).

1287203 is an equidigital number, since it uses as much as digits as its factorization.

1287203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21876.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1287203 is about 1134.5496904058. The cubic root of 1287203 is about 108.7799899673.

The spelling of 1287203 in words is "one million, two hundred eighty-seven thousand, two hundred three".