11555849 has 4 divisors (see below), whose sum is σ = 11685780. Its totient is φ = 11425920.

The previous prime is 11555783. The next prime is 11555909. The reversal of 11555849 is 94855511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94855511 = 2237 ⋅42403.

It can be written as a sum of positive squares in 2 ways, for example, as 5017600 + 6538249 = 2240^2 + 2557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11555849 is a prime.

It is a super-2 number, since 2×11555849² = 267075292221602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11555149) 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, 64832 + ... + 65009.

It is an arithmetic number, because the mean of its divisors is an integer number (2921445).

Almost surely, 2^11555849 is an apocalyptic number.

It is an amenable number.

11555849 is a deficient number, since it is larger than the sum of its proper divisors (129931).

11555849 is an equidigital number, since it uses as much as digits as its factorization.

11555849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129930.

The product of its digits is 36000, while the sum is 38.

The square root of 11555849 is about 3399.3895040139. The cubic root of 11555849 is about 226.0826765671.

The spelling of 11555849 in words is "eleven million, five hundred fifty-five thousand, eight hundred forty-nine".