1491003 has 6 divisors (see below), whose sum is σ = 2153684. Its totient is φ = 993996.

The previous prime is 1491001. The next prime is 1491013. The reversal of 1491003 is 3001941.

It is not a de Polignac number, because 1491003 - 2¹ = 1491001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82825 + ... + 82842.

2^1491003 is an apocalyptic number.

1491003 is a deficient number, since it is larger than the sum of its proper divisors (662681).

1491003 is a wasteful number, since it uses less digits than its factorization.

1491003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165673 (or 165670 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1491003 is about 1221.0663372643. The cubic root of 1491003 is about 114.2420986097.

Adding to 1491003 its reverse (3001941), we get a palindrome (4492944).

The spelling of 1491003 in words is "one million, four hundred ninety-one thousand, three".