1491043 has 4 divisors (see below), whose sum is σ = 1501200. Its totient is φ = 1480888.

The previous prime is 1491041. The next prime is 1491079. The reversal of 1491043 is 3401941.

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 1491043 - 2¹ = 1491041 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1491043 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1491041) 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, 4855 + ... + 5152.

It is an arithmetic number, because the mean of its divisors is an integer number (375300).

2^1491043 is an apocalyptic number.

1491043 is a deficient number, since it is larger than the sum of its proper divisors (10157).

1491043 is a wasteful number, since it uses less digits than its factorization.

1491043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10156.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1491043 is about 1221.0827162809. The cubic root of 1491043 is about 114.2431202136.

Adding to 1491043 its reverse (3401941), we get a palindrome (4892984).

The spelling of 1491043 in words is "one million, four hundred ninety-one thousand, forty-three".