1321246085 has 4 divisors (see below), whose sum is σ = 1585495308. Its totient is φ = 1056996864.

The previous prime is 1321246081. The next prime is 1321246099. The reversal of 1321246085 is 5806421231.

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 491863684 + 829382401 = 22178^2 + 28799^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321246085 - 2² = 1321246081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321246081) 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, 132124604 + ... + 132124613.

It is an arithmetic number, because the mean of its divisors is an integer number (396373827).

Almost surely, 2^1321246085 is an apocalyptic number.

It is an amenable number.

1321246085 is a deficient number, since it is larger than the sum of its proper divisors (264249223).

1321246085 is an equidigital number, since it uses as much as digits as its factorization.

1321246085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264249222.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1321246085 is about 36348.9488843900. The cubic root of 1321246085 is about 1097.3063804709.

The spelling of 1321246085 in words is "one billion, three hundred twenty-one million, two hundred forty-six thousand, eighty-five".