11895821 has 8 divisors (see below), whose sum is σ = 13911744. Its totient is φ = 9959040.

The previous prime is 11895799. The next prime is 11895823. The reversal of 11895821 is 12859811.

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

It is not a de Polignac number, because 11895821 - 2¹⁴ = 11879437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11895823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19460 + ... + 20061.

It is an arithmetic number, because the mean of its divisors is an integer number (1738968).

Almost surely, 2^11895821 is an apocalyptic number.

It is an amenable number.

11895821 is a deficient number, since it is larger than the sum of its proper divisors (2015923).

11895821 is an equidigital number, since it uses as much as digits as its factorization.

11895821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39571.

The product of its digits is 5760, while the sum is 35.

The square root of 11895821 is about 3449.0318931549. The cubic root of 11895821 is about 228.2783931373.

The spelling of 11895821 in words is "eleven million, eight hundred ninety-five thousand, eight hundred twenty-one".