1284348643 has 4 divisors (see below), whose sum is σ = 1351945960. Its totient is φ = 1216751328.

The previous prime is 1284348617. The next prime is 1284348647. The reversal of 1284348643 is 3468434821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1284348643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1284348643.

It is not an unprimeable number, because it can be changed into a prime (1284348647) 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, 33798630 + ... + 33798667.

It is an arithmetic number, because the mean of its divisors is an integer number (337986490).

Almost surely, 2^1284348643 is an apocalyptic number.

1284348643 is a deficient number, since it is larger than the sum of its proper divisors (67597317).

1284348643 is an equidigital number, since it uses as much as digits as its factorization.

1284348643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67597316.

The product of its digits is 442368, while the sum is 43.

The square root of 1284348643 is about 35837.8102428148. The cubic root of 1284348643 is about 1086.9952435917.

The spelling of 1284348643 in words is "one billion, two hundred eighty-four million, three hundred forty-eight thousand, six hundred forty-three".