11561854 has 4 divisors (see below), whose sum is σ = 17342784. Its totient is φ = 5780926.

The previous prime is 11561843. The next prime is 11561863. The reversal of 11561854 is 45816511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45816511 = 13 ⋅3524347.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2890462 + ... + 2890465.

It is an arithmetic number, because the mean of its divisors is an integer number (4335696).

Almost surely, 2^11561854 is an apocalyptic number.

11561854 is a deficient number, since it is larger than the sum of its proper divisors (5780930).

11561854 is an equidigital number, since it uses as much as digits as its factorization.

11561854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780929.

The product of its digits is 4800, while the sum is 31.

The square root of 11561854 is about 3400.2726361279. The cubic root of 11561854 is about 226.1218310933.

The spelling of 11561854 in words is "eleven million, five hundred sixty-one thousand, eight hundred fifty-four".