1321446449 has 4 divisors (see below), whose sum is σ = 1321531200. Its totient is φ = 1321361700.

The previous prime is 1321446443. The next prime is 1321446461. The reversal of 1321446449 is 9446441231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321446449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321446443) 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, 11477 + ... + 52674.

It is an arithmetic number, because the mean of its divisors is an integer number (330382800).

Almost surely, 2^1321446449 is an apocalyptic number.

It is an amenable number.

1321446449 is a deficient number, since it is larger than the sum of its proper divisors (84751).

1321446449 is an equidigital number, since it uses as much as digits as its factorization.

1321446449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84750.

The product of its digits is 82944, while the sum is 38.

The square root of 1321446449 is about 36351.7048981200. The cubic root of 1321446449 is about 1097.3618456830.

The spelling of 1321446449 in words is "one billion, three hundred twenty-one million, four hundred forty-six thousand, four hundred forty-nine".