1321446439 has 4 divisors (see below), whose sum is σ = 1378900656. Its totient is φ = 1263992224.

The previous prime is 1321446421. The next prime is 1321446443. The reversal of 1321446439 is 9346441231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9346441231 = 11393 ⋅820367.

It is a cyclic number.

It is not a de Polignac number, because 1321446439 - 2¹⁷ = 1321315367 is a prime.

It is a super-2 number, since 2×1321446439² = 3492441382291561442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321446398 and 1321446407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321446419) 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, 28727074 + ... + 28727119.

It is an arithmetic number, because the mean of its divisors is an integer number (344725164).

Almost surely, 2^1321446439 is an apocalyptic number.

1321446439 is a deficient number, since it is larger than the sum of its proper divisors (57454217).

1321446439 is an equidigital number, since it uses as much as digits as its factorization.

1321446439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57454216.

The product of its digits is 62208, while the sum is 37.

The square root of 1321446439 is about 36351.7047605748. The cubic root of 1321446439 is about 1097.3618429149.

The spelling of 1321446439 in words is "one billion, three hundred twenty-one million, four hundred forty-six thousand, four hundred thirty-nine".