1320903 has 6 divisors (see below), whose sum is σ = 1907984. Its totient is φ = 880596.

The previous prime is 1320901. The next prime is 1320911. The reversal of 1320903 is 3090231.

It is not a de Polignac number, because 1320903 - 2¹ = 1320901 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 (1320901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73375 + ... + 73392.

2^1320903 is an apocalyptic number.

1320903 is a deficient number, since it is larger than the sum of its proper divisors (587081).

1320903 is a wasteful number, since it uses less digits than its factorization.

1320903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146773 (or 146770 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1320903 is about 1149.3054424303. The cubic root of 1320903 is about 109.7211393889.

The spelling of 1320903 in words is "one million, three hundred twenty thousand, nine hundred three".