11357861 has 4 divisors (see below), whose sum is σ = 11634924. Its totient is φ = 11080800.

The previous prime is 11357849. The next prime is 11357867. The reversal of 11357861 is 16875311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16875311 = 83 ⋅203317.

It can be written as a sum of positive squares in 2 ways, for example, as 592900 + 10764961 = 770^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 11357861 - 2¹⁰ = 11356837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11357867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138470 + ... + 138551.

It is an arithmetic number, because the mean of its divisors is an integer number (2908731).

Almost surely, 2^11357861 is an apocalyptic number.

It is an amenable number.

11357861 is a deficient number, since it is larger than the sum of its proper divisors (277063).

11357861 is an equidigital number, since it uses as much as digits as its factorization.

11357861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277062.

The product of its digits is 5040, while the sum is 32.

The square root of 11357861 is about 3370.1425785863. The cubic root of 11357861 is about 224.7840627857.

The spelling of 11357861 in words is "eleven million, three hundred fifty-seven thousand, eight hundred sixty-one".