1003491 has 12 divisors (see below), whose sum is σ = 1483768. Its totient is φ = 653184.

The previous prime is 1003469. The next prime is 1003507. The reversal of 1003491 is 1943001.

It is not a de Polignac number, because 1003491 - 2⁷ = 1003363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 910 + ... + 1683.

2^1003491 is an apocalyptic number.

1003491 is a deficient number, since it is larger than the sum of its proper divisors (480277).

1003491 is a wasteful number, since it uses less digits than its factorization.

1003491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642 (or 2639 counting only the distinct ones).

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

The square root of 1003491 is about 1001.7439792682. The cubic root of 1003491 is about 100.1162315167.

Adding to 1003491 its reverse (1943001), we get a palindrome (2946492).

The spelling of 1003491 in words is "one million, three thousand, four hundred ninety-one".