1315765321 has 8 divisors (see below), whose sum is σ = 1423223424. Its totient is φ = 1209199440.

The previous prime is 1315765309. The next prime is 1315765361. The reversal of 1315765321 is 1235675131.

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 1315765321 - 2⁵ = 1315765289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315765361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219985 + ... + 225886.

It is an arithmetic number, because the mean of its divisors is an integer number (177902928).

Almost surely, 2^1315765321 is an apocalyptic number.

It is an amenable number.

1315765321 is a deficient number, since it is larger than the sum of its proper divisors (107458103).

1315765321 is a wasteful number, since it uses less digits than its factorization.

1315765321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446111.

The product of its digits is 18900, while the sum is 34.

The square root of 1315765321 is about 36273.4795821961. The cubic root of 1315765321 is about 1095.7870035701.

The spelling of 1315765321 in words is "one billion, three hundred fifteen million, seven hundred sixty-five thousand, three hundred twenty-one".