1381003 has 8 divisors (see below), whose sum is σ = 1524096. Its totient is φ = 1243200.

The previous prime is 1380997. The next prime is 1381027. The reversal of 1381003 is 3001831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1381003 - 2⁵ = 1380971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763 + ... + 1828.

It is an arithmetic number, because the mean of its divisors is an integer number (190512).

2^1381003 is an apocalyptic number.

1381003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1381003 is a deficient number, since it is larger than the sum of its proper divisors (143093).

1381003 is a wasteful number, since it uses less digits than its factorization.

1381003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1381003 is about 1175.1608400555. The cubic root of 1381003 is about 111.3605944773.

Adding to 1381003 its reverse (3001831), we get a palindrome (4382834).

The spelling of 1381003 in words is "one million, three hundred eighty-one thousand, three".