1321430001565 has 8 divisors (see below), whose sum is σ = 1585736511840. Its totient is φ = 1057130327952.

The previous prime is 1321430001553. The next prime is 1321430001581. The reversal of 1321430001565 is 5651000341231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321430001565 - 2⁹ = 1321430001053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273855 + ... + 2065324.

It is an arithmetic number, because the mean of its divisors is an integer number (198217063980).

Almost surely, 2^{1321430001565} is an apocalyptic number.

It is an amenable number.

1321430001565 is a deficient number, since it is larger than the sum of its proper divisors (264306510275).

1321430001565 is an equidigital number, since it uses as much as digits as its factorization.

1321430001565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418331.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 1321430001565 its reverse (5651000341231), we get a palindrome (6972430342796).

The spelling of 1321430001565 in words is "one trillion, three hundred twenty-one billion, four hundred thirty million, one thousand, five hundred sixty-five".