1395844321 has 3 divisors (see below), whose sum is σ = 1395881683. Its totient is φ = 1395806960.

The previous prime is 1395844297. The next prime is 1395844337. The reversal of 1395844321 is 1234485931.

It is a happy number.

The square root of 1395844321 is 37361.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 966525921 + 429318400 = 31089^2 + 20720^2 .

It is not a de Polignac number, because 1395844321 - 2¹⁵ = 1395811553 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1395844391) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18681 + ... + 56041.

Almost surely, 2^1395844321 is an apocalyptic number.

1395844321 is the 37361-st square number.

1395844321 is the 18681-st centered octagonal number.

It is an amenable number.

1395844321 is a deficient number, since it is larger than the sum of its proper divisors (37362).

1395844321 is an frugal number, since it uses more digits than its factorization.

1395844321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74722 (or 37361 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The cubic root of 1395844321 is about 1117.5809612246.

The spelling of 1395844321 in words is "one billion, three hundred ninety-five million, eight hundred forty-four thousand, three hundred twenty-one".