1281530707 has 4 divisors (see below), whose sum is σ = 1296970920. Its totient is φ = 1266090496.

The previous prime is 1281530699. The next prime is 1281530741. The reversal of 1281530707 is 7070351821.

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 1281530707 - 2³ = 1281530699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281530777) 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, 7719982 + ... + 7720147.

It is an arithmetic number, because the mean of its divisors is an integer number (324242730).

Almost surely, 2^1281530707 is an apocalyptic number.

1281530707 is a deficient number, since it is larger than the sum of its proper divisors (15440213).

1281530707 is an equidigital number, since it uses as much as digits as its factorization.

1281530707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15440212.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 1281530707 is about 35798.4735289090. The cubic root of 1281530707 is about 1086.1996844382.

The spelling of 1281530707 in words is "one billion, two hundred eighty-one million, five hundred thirty thousand, seven hundred seven".