1321441481 has 2 divisors, whose sum is σ = 1321441482. Its totient is φ = 1321441480.

The previous prime is 1321441403. The next prime is 1321441483. The reversal of 1321441481 is 1841441231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 806560000 + 514881481 = 28400^2 + 22691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321441481 is a prime.

It is a super-2 number, since 2×1321441481² = 3492415175414946722, which contains 22 as substring.

Together with 1321441483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1321441483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660720740 + 660720741.

It is an arithmetic number, because the mean of its divisors is an integer number (660720741).

Almost surely, 2^1321441481 is an apocalyptic number.

It is an amenable number.

1321441481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321441481 is an equidigital number, since it uses as much as digits as its factorization.

1321441481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 29.

The square root of 1321441481 is about 36351.6365656348. The cubic root of 1321441481 is about 1097.3604704978.

The spelling of 1321441481 in words is "one billion, three hundred twenty-one million, four hundred forty-one thousand, four hundred eighty-one".