1282945639 has 2 divisors, whose sum is σ = 1282945640. Its totient is φ = 1282945638.

The previous prime is 1282945583. The next prime is 1282945667. The reversal of 1282945639 is 9365492821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1282945639 - 2¹⁹ = 1282421351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1282945592 and 1282945601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1282945039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641472819 + 641472820.

It is an arithmetic number, because the mean of its divisors is an integer number (641472820).

Almost surely, 2^1282945639 is an apocalyptic number.

1282945639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1282945639 is an equidigital number, since it uses as much as digits as its factorization.

1282945639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 1282945639 is about 35818.2305397684. The cubic root of 1282945639 is about 1086.5992933857.

The spelling of 1282945639 in words is "one billion, two hundred eighty-two million, nine hundred forty-five thousand, six hundred thirty-nine".