11855947 has 4 divisors (see below), whose sum is σ = 12176416. Its totient is φ = 11535480.

The previous prime is 11855933. The next prime is 11855959. The reversal of 11855947 is 74955811.

It is a happy number.

11855947 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74955811 = 7 ⋅10707973.

It is a cyclic number.

It is not a de Polignac number, because 11855947 - 2¹¹ = 11853899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11855147) 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, 160179 + ... + 160252.

It is an arithmetic number, because the mean of its divisors is an integer number (3044104).

Almost surely, 2^11855947 is an apocalyptic number.

11855947 is a deficient number, since it is larger than the sum of its proper divisors (320469).

11855947 is an equidigital number, since it uses as much as digits as its factorization.

11855947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320468.

The product of its digits is 50400, while the sum is 40.

The square root of 11855947 is about 3443.2465784489. The cubic root of 11855947 is about 228.0230496344.

It can be divided in two parts, 118 and 55947, that added together give a palindrome (56065).

The spelling of 11855947 in words is "eleven million, eight hundred fifty-five thousand, nine hundred forty-seven".