1491746043 has 4 divisors (see below), whose sum is σ = 1988994728. Its totient is φ = 994497360.

The previous prime is 1491746041. The next prime is 1491746077. The reversal of 1491746043 is 3406471941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3406471941 = 3 ⋅1135490647.

It is not a de Polignac number, because 1491746043 - 2¹ = 1491746041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1491745992 and 1491746010.

It is not an unprimeable number, because it can be changed into a prime (1491746041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248624338 + ... + 248624343.

It is an arithmetic number, because the mean of its divisors is an integer number (497248682).

Almost surely, 2^1491746043 is an apocalyptic number.

1491746043 is a deficient number, since it is larger than the sum of its proper divisors (497248685).

1491746043 is an equidigital number, since it uses as much as digits as its factorization.

1491746043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497248684.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 1491746043 is about 38623.1283430019. The cubic root of 1491746043 is about 1142.6107301699.

The spelling of 1491746043 in words is "one billion, four hundred ninety-one million, seven hundred forty-six thousand, forty-three".