11896521 has 16 divisors (see below), whose sum is σ = 19522944. Its totient is φ = 6274944.

The previous prime is 11896517. The next prime is 11896523. The reversal of 11896521 is 12569811.

11896521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11896521 - 2² = 11896517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11896523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21516 + ... + 22061.

It is an arithmetic number, because the mean of its divisors is an integer number (1220184).

Almost surely, 2^11896521 is an apocalyptic number.

It is an amenable number.

11896521 is a deficient number, since it is larger than the sum of its proper divisors (7626423).

11896521 is a wasteful number, since it uses less digits than its factorization.

11896521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43600.

The product of its digits is 4320, while the sum is 33.

The square root of 11896521 is about 3449.1333694133. The cubic root of 11896521 is about 228.2828706688.

It can be divided in two parts, 1189652 and 1, that added together give a triangular number (1189653 = T₁₅₄₂).

The spelling of 11896521 in words is "eleven million, eight hundred ninety-six thousand, five hundred twenty-one".