1321404305 has 32 divisors (see below), whose sum is σ = 1903305600. Its totient is φ = 870054912.

The previous prime is 1321404299. The next prime is 1321404431. The reversal of 1321404305 is 5034041231.

It is a cyclic number.

It is not a de Polignac number, because 1321404305 - 2¹⁶ = 1321338769 is a prime.

It is a super-2 number, since 2×1321404305² = 3492218674545066050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10475 + ... + 52464.

It is an arithmetic number, because the mean of its divisors is an integer number (59478300).

Almost surely, 2^1321404305 is an apocalyptic number.

It is an amenable number.

1321404305 is a deficient number, since it is larger than the sum of its proper divisors (581901295).

1321404305 is a wasteful number, since it uses less digits than its factorization.

1321404305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62993.

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

The square root of 1321404305 is about 36351.1252232995. The cubic root of 1321404305 is about 1097.3501797520.

Adding to 1321404305 its reverse (5034041231), we get a palindrome (6355445536).

The spelling of 1321404305 in words is "one billion, three hundred twenty-one million, four hundred four thousand, three hundred five".