1281530741 has 2 divisors, whose sum is σ = 1281530742. Its totient is φ = 1281530740.

The previous prime is 1281530699. The next prime is 1281530773. The reversal of 1281530741 is 1470351821.

It is an a-pointer prime, because the next prime (1281530773) can be obtained adding 1281530741 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1242280516 + 39250225 = 35246^2 + 6265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1281530741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1281530698 and 1281530707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281530441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640765370 + 640765371.

It is an arithmetic number, because the mean of its divisors is an integer number (640765371).

Almost surely, 2^1281530741 is an apocalyptic number.

It is an amenable number.

1281530741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281530741 is an equidigital number, since it uses as much as digits as its factorization.

1281530741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1281530741 is about 35798.4740037896. The cubic root of 1281530741 is about 1086.1996940441.

The spelling of 1281530741 in words is "one billion, two hundred eighty-one million, five hundred thirty thousand, seven hundred forty-one".