11855845 has 8 divisors (see below), whose sum is σ = 14261400. Its totient is φ = 9461760.

The previous prime is 11855839. The next prime is 11855869. The reversal of 11855845 is 54855811.

It can be written as a sum of positive squares in 4 ways, for example, as 343396 + 11512449 = 586^2 + 3393^2 .

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

It is not a de Polignac number, because 11855845 - 2⁵ = 11855813 is a prime.

It is a super-2 number, since 2×11855845² = 281122121328050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396 + ... + 4885.

It is an arithmetic number, because the mean of its divisors is an integer number (1782675).

Almost surely, 2^11855845 is an apocalyptic number.

It is an amenable number.

11855845 is a deficient number, since it is larger than the sum of its proper divisors (2405555).

11855845 is an equidigital number, since it uses as much as digits as its factorization.

11855845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5735.

The product of its digits is 32000, while the sum is 37.

The square root of 11855845 is about 3443.2317668144. The cubic root of 11855845 is about 228.0223957174.

The spelling of 11855845 in words is "eleven million, eight hundred fifty-five thousand, eight hundred forty-five".