11405321 has 2 divisors, whose sum is σ = 11405322. Its totient is φ = 11405320.

The previous prime is 11405297. The next prime is 11405327. The reversal of 11405321 is 12350411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8880400 + 2524921 = 2980^2 + 1589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11405321 is a prime.

It is a super-2 number, since 2×11405321² = 260162694226082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11405321.

It is not a weakly prime, because it can be changed into another prime (11405327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5702660 + 5702661.

It is an arithmetic number, because the mean of its divisors is an integer number (5702661).

Almost surely, 2^11405321 is an apocalyptic number.

It is an amenable number.

11405321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11405321 is an equidigital number, since it uses as much as digits as its factorization.

11405321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 11405321 is about 3377.1764833956. The cubic root of 11405321 is about 225.0967222015.

Adding to 11405321 its reverse (12350411), we get a palindrome (23755732).

The spelling of 11405321 in words is "eleven million, four hundred five thousand, three hundred twenty-one".