1321403045 has 8 divisors (see below), whose sum is σ = 1611678840. Its totient is φ = 1039792320.

The previous prime is 1321403033. The next prime is 1321403071. The reversal of 1321403045 is 5403041231.

It can be written as a sum of positive squares in 4 ways, for example, as 6832996 + 1314570049 = 2614^2 + 36257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321403045 - 2²² = 1317208741 is a prime.

It is a super-2 number, since 2×1321403045² = 3492212014670544050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1321403045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2165930 + ... + 2166539.

It is an arithmetic number, because the mean of its divisors is an integer number (201459855).

Almost surely, 2^1321403045 is an apocalyptic number.

It is an amenable number.

1321403045 is a deficient number, since it is larger than the sum of its proper divisors (290275795).

1321403045 is an equidigital number, since it uses as much as digits as its factorization.

1321403045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332535.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1321403045 is about 36351.1078923325. The cubic root of 1321403045 is about 1097.3498309660.

Adding to 1321403045 its reverse (5403041231), we get a palindrome (6724444276).

The spelling of 1321403045 in words is "one billion, three hundred twenty-one million, four hundred three thousand, forty-five".