1321044413 has 4 divisors (see below), whose sum is σ = 1422663228. Its totient is φ = 1219425600.

The previous prime is 1321044391. The next prime is 1321044481. The reversal of 1321044413 is 3144401231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3144401231 = 23 ⋅136713097.

It can be written as a sum of positive squares in 2 ways, for example, as 877225924 + 443818489 = 29618^2 + 21067^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321044413 - 2¹⁸ = 1320782269 is a prime.

It is a super-2 number, since 2×1321044413² = 3490316682237029138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321043413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50809388 + ... + 50809413.

It is an arithmetic number, because the mean of its divisors is an integer number (355665807).

Almost surely, 2^1321044413 is an apocalyptic number.

1321044413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1321044413 is a deficient number, since it is larger than the sum of its proper divisors (101618815).

1321044413 is a wasteful number, since it uses less digits than its factorization.

1321044413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101618814.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1321044413 is about 36346.1746680445. The cubic root of 1321044413 is about 1097.2505475126.

Adding to 1321044413 its reverse (3144401231), we get a palindrome (4465445644).

The spelling of 1321044413 in words is "one billion, three hundred twenty-one million, forty-four thousand, four hundred thirteen".