1321253341 has 2 divisors, whose sum is σ = 1321253342. Its totient is φ = 1321253340.

The previous prime is 1321253287. The next prime is 1321253347. The reversal of 1321253341 is 1433521231.

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., 1132053316 + 189200025 = 33646^2 + 13755^2 .

It is an emirp because it is prime and its reverse (1433521231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321253341 - 2¹¹ = 1321251293 is a prime.

It is a super-2 number, since 2×1321253341² = 3491420782207324562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321253347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660626670 + 660626671.

It is an arithmetic number, because the mean of its divisors is an integer number (660626671).

Almost surely, 2^1321253341 is an apocalyptic number.

It is an amenable number.

1321253341 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321253341 is an equidigital number, since it uses as much as digits as its factorization.

1321253341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 1321253341 is about 36349.0486945670. The cubic root of 1321253341 is about 1097.3083891910.

Adding to 1321253341 its reverse (1433521231), we get a palindrome (2754774572).

The spelling of 1321253341 in words is "one billion, three hundred twenty-one million, two hundred fifty-three thousand, three hundred forty-one".