1317821465 has 8 divisors (see below), whose sum is σ = 1582011648. Its totient is φ = 1053839920.

The previous prime is 1317821443. The next prime is 1317821497. The reversal of 1317821465 is 5641287131.

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

It is not a de Polignac number, because 1317821465 - 2¹⁴ = 1317805081 is a prime.

It is a super-2 number, since 2×1317821465² = 3473306827229492450, which contains 22 as substring.

It is a Duffinian 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, 37907 + ... + 63816.

It is an arithmetic number, because the mean of its divisors is an integer number (197751456).

Almost surely, 2^1317821465 is an apocalyptic number.

It is an amenable number.

1317821465 is a deficient number, since it is larger than the sum of its proper divisors (264190183).

1317821465 is a wasteful number, since it uses less digits than its factorization.

1317821465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104319.

The product of its digits is 40320, while the sum is 38.

The square root of 1317821465 is about 36301.8107675086. The cubic root of 1317821465 is about 1096.3575012666.

It can be divided in two parts, 13178 and 21465, that added together give a palindrome (34643).

The spelling of 1317821465 in words is "one billion, three hundred seventeen million, eight hundred twenty-one thousand, four hundred sixty-five".