1365303721 has 6 divisors (see below), whose sum is σ = 1376155050. Its totient is φ = 1354537296.

The previous prime is 1365303701. The next prime is 1365303733. The reversal of 1365303721 is 1273035631.

It can be written as a sum of positive squares in only one way, i.e., 952401321 + 412902400 = 30861^2 + 20320^2 .

It is not a de Polignac number, because 1365303721 - 2¹⁷ = 1365172649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1365303701) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 26196 + ... + 58453.

It is an arithmetic number, because the mean of its divisors is an integer number (229359175).

Almost surely, 2^1365303721 is an apocalyptic number.

It is an amenable number.

1365303721 is a deficient number, since it is larger than the sum of its proper divisors (10851329).

1365303721 is an frugal number, since it uses more digits than its factorization.

1365303721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84903 (or 84776 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 1365303721 is about 36950.0165223238. The cubic root of 1365303721 is about 1109.3700185729.

The spelling of 1365303721 in words is "one billion, three hundred sixty-five million, three hundred three thousand, seven hundred twenty-one".