1347326721 has 48 divisors (see below), whose sum is σ = 2225779920. Its totient is φ = 778014720.

The previous prime is 1347326713. The next prime is 1347326723. The reversal of 1347326721 is 1276237431.

It can be written as a sum of positive squares in 8 ways, for example, as 10400625 + 1336926096 = 3225^2 + 36564^2 .

It is not a de Polignac number, because 1347326721 - 2³ = 1347326713 is a prime.

It is a super-2 number, since 2×1347326721² = 3630578586241223682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1347326723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 836565 + ... + 838173.

It is an arithmetic number, because the mean of its divisors is an integer number (46370415).

Almost surely, 2^1347326721 is an apocalyptic number.

It is an amenable number.

1347326721 is a deficient number, since it is larger than the sum of its proper divisors (878453199).

1347326721 is a wasteful number, since it uses less digits than its factorization.

1347326721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066 (or 2063 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 1347326721 is about 36705.9493951594. The cubic root of 1347326721 is about 1104.4794531586.

The spelling of 1347326721 in words is "one billion, three hundred forty-seven million, three hundred twenty-six thousand, seven hundred twenty-one".