1491437043 has 42 divisors (see below), whose sum is σ = 2277580284. Its totient is φ = 976055184.

The previous prime is 1491437023. The next prime is 1491437071. The reversal of 1491437043 is 3407341941.

It is not a de Polignac number, because 1491437043 - 2¹⁶ = 1491371507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1491436989 and 1491437007.

It is not an unprimeable number, because it can be changed into a prime (1491437023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 9499521 + ... + 9499677.

It is an arithmetic number, because the mean of its divisors is an integer number (54228102).

Almost surely, 2^1491437043 is an apocalyptic number.

1491437043 is a deficient number, since it is larger than the sum of its proper divisors (786143241).

1491437043 is an frugal number, since it uses more digits than its factorization.

1491437043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1491437043 is about 38619.1279419927. The cubic root of 1491437043 is about 1142.5318313300.

Adding to 1491437043 its reverse (3407341941), we get a palindrome (4898778984).

The spelling of 1491437043 in words is "one billion, four hundred ninety-one million, four hundred thirty-seven thousand, forty-three".