11321861 has 8 divisors (see below), whose sum is σ = 11889120. Its totient is φ = 10766448.

The previous prime is 11321839. The next prime is 11321897. The reversal of 11321861 is 16812311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11321861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971 + ... + 4856.

It is an arithmetic number, because the mean of its divisors is an integer number (1486140).

Almost surely, 2^11321861 is an apocalyptic number.

11321861 is the 1943-rd octagonal number.

It is an amenable number.

11321861 is a deficient number, since it is larger than the sum of its proper divisors (567259).

11321861 is an equidigital number, since it uses as much as digits as its factorization.

11321861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5923.

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

The square root of 11321861 is about 3364.7973193047. The cubic root of 11321861 is about 224.5463187514.

The spelling of 11321861 in words is "eleven million, three hundred twenty-one thousand, eight hundred sixty-one".