1281301039 has 4 divisors (see below), whose sum is σ = 1282862520. Its totient is φ = 1279739560.

The previous prime is 1281300989. The next prime is 1281301051. The reversal of 1281301039 is 9301031821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9301031821 = 17419 ⋅533959.

It is a cyclic number.

It is not a de Polignac number, because 1281301039 - 2¹³ = 1281292847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1281300998 and 1281301016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281304039) 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 3 ways as a sum of consecutive naturals, for example, 779509 + ... + 781150.

It is an arithmetic number, because the mean of its divisors is an integer number (320715630).

Almost surely, 2^1281301039 is an apocalyptic number.

1281301039 is a deficient number, since it is larger than the sum of its proper divisors (1561481).

1281301039 is an equidigital number, since it uses as much as digits as its factorization.

1281301039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561480.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1281301039 is about 35795.2655947683. The cubic root of 1281301039 is about 1086.1347932338.

The spelling of 1281301039 in words is "one billion, two hundred eighty-one million, three hundred one thousand, thirty-nine".