1321284479 has 4 divisors (see below), whose sum is σ = 1332977376. Its totient is φ = 1309591584.

The previous prime is 1321284463. The next prime is 1321284499. The reversal of 1321284479 is 9744821231.

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 1321284479 - 2⁴ = 1321284463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321284439) 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, 5846279 + ... + 5846504.

It is an arithmetic number, because the mean of its divisors is an integer number (333244344).

Almost surely, 2^1321284479 is an apocalyptic number.

1321284479 is a deficient number, since it is larger than the sum of its proper divisors (11692897).

1321284479 is a wasteful number, since it uses less digits than its factorization.

1321284479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11692896.

The product of its digits is 96768, while the sum is 41.

The square root of 1321284479 is about 36349.4770113684. The cubic root of 1321284479 is about 1097.3170092184.

The spelling of 1321284479 in words is "one billion, three hundred twenty-one million, two hundred eighty-four thousand, four hundred seventy-nine".