11861321 has 4 divisors (see below), whose sum is σ = 11907732. Its totient is φ = 11814912.

The previous prime is 11861303. The next prime is 11861327. The reversal of 11861321 is 12316811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11424400 + 436921 = 3380^2 + 661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11861321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11861327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22820 + ... + 23333.

It is an arithmetic number, because the mean of its divisors is an integer number (2976933).

Almost surely, 2^11861321 is an apocalyptic number.

It is an amenable number.

11861321 is a deficient number, since it is larger than the sum of its proper divisors (46411).

11861321 is an equidigital number, since it uses as much as digits as its factorization.

11861321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46410.

The product of its digits is 288, while the sum is 23.

The square root of 11861321 is about 3444.0268581996. The cubic root of 11861321 is about 228.0574967848.

The spelling of 11861321 in words is "eleven million, eight hundred sixty-one thousand, three hundred twenty-one".