1321246361 has 4 divisors (see below), whose sum is σ = 1353471924. Its totient is φ = 1289020800.

The previous prime is 1321246309. The next prime is 1321246363. The reversal of 1321246361 is 1636421231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 448634761 + 872611600 = 21181^2 + 29540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321246361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321246363) 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, 16112720 + ... + 16112801.

It is an arithmetic number, because the mean of its divisors is an integer number (338367981).

Almost surely, 2^1321246361 is an apocalyptic number.

It is an amenable number.

1321246361 is a deficient number, since it is larger than the sum of its proper divisors (32225563).

1321246361 is an equidigital number, since it uses as much as digits as its factorization.

1321246361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32225562.

The product of its digits is 5184, while the sum is 29.

The square root of 1321246361 is about 36348.9526809233. The cubic root of 1321246361 is about 1097.3064568777.

Adding to 1321246361 its reverse (1636421231), we get a palindrome (2957667592).

The spelling of 1321246361 in words is "one billion, three hundred twenty-one million, two hundred forty-six thousand, three hundred sixty-one".