1491444041 has 2 divisors, whose sum is σ = 1491444042. Its totient is φ = 1491444040.

The previous prime is 1491443981. The next prime is 1491444079. The reversal of 1491444041 is 1404441941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1484175625 + 7268416 = 38525^2 + 2696^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491444041 - 2¹⁸ = 1491181897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1491443989 and 1491444007.

It is not a weakly prime, because it can be changed into another prime (1491444341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745722020 + 745722021.

It is an arithmetic number, because the mean of its divisors is an integer number (745722021).

Almost surely, 2^1491444041 is an apocalyptic number.

It is an amenable number.

1491444041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491444041 is an equidigital number, since it uses as much as digits as its factorization.

1491444041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1491444041 is about 38619.2185446573. The cubic root of 1491444041 is about 1142.5336182923.

Adding to 1491444041 its reverse (1404441941), we get a palindrome (2895885982).

The spelling of 1491444041 in words is "one billion, four hundred ninety-one million, four hundred forty-four thousand, forty-one".