1284478728482 has 4 divisors (see below), whose sum is σ = 1926718092726. Its totient is φ = 642239364240.

The previous prime is 1284478728479. The next prime is 1284478728509. The reversal of 1284478728482 is 2848278744821.

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

It can be written as a sum of positive squares in only one way, i.e., 1220408487841 + 64070240641 = 1104721^2 + 253121^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321119682119 + ... + 321119682122.

Almost surely, 2^{1284478728482} is an apocalyptic number.

1284478728482 is a deficient number, since it is larger than the sum of its proper divisors (642239364244).

1284478728482 is an equidigital number, since it uses as much as digits as its factorization.

1284478728482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642239364243.

The product of its digits is 102760448, while the sum is 65.

The spelling of 1284478728482 in words is "one trillion, two hundred eighty-four billion, four hundred seventy-eight million, seven hundred twenty-eight thousand, four hundred eighty-two".