1365121320 has 64 divisors (see below), whose sum is σ = 4099680000. Its totient is φ = 363648768.

The previous prime is 1365121297. The next prime is 1365121333. The reversal of 1365121320 is 231215631.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 15 ways as a sum of consecutive naturals, for example, 119206 + ... + 130154.

It is an arithmetic number, because the mean of its divisors is an integer number (64057500).

Almost surely, 2^1365121320 is an apocalyptic number.

1365121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1365121320 is an abundant number, since it is smaller than the sum of its proper divisors (2734558680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1365121320 is a wasteful number, since it uses less digits than its factorization.

1365121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12002 (or 11998 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1365121320 is about 36947.5482271828. The cubic root of 1365121320 is about 1109.3206133967.

Adding to 1365121320 its reverse (231215631), we get a palindrome (1596336951).

The spelling of 1365121320 in words is "one billion, three hundred sixty-five million, one hundred twenty-one thousand, three hundred twenty".