11413521 has 24 divisors (see below), whose sum is σ = 19671840. Its totient is φ = 6521256.

The previous prime is 11413483. The next prime is 11413531. The reversal of 11413521 is 12531411.

11413521 is a `hidden beast` number, since 1 + 141 + 3 + 521 = 666.

It is not a de Polignac number, because 11413521 - 2⁷ = 11413393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11413494 and 11413503.

It is not an unprimeable number, because it can be changed into a prime (11413531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2991 + ... + 5636.

It is an arithmetic number, because the mean of its divisors is an integer number (819660).

Almost surely, 2^11413521 is an apocalyptic number.

It is an amenable number.

11413521 is a deficient number, since it is larger than the sum of its proper divisors (8258319).

11413521 is an equidigital number, since it uses as much as digits as its factorization.

11413521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8650 (or 8637 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 11413521 is about 3378.3902971682. The cubic root of 11413521 is about 225.1506546583.

Adding to 11413521 its reverse (12531411), we get a palindrome (23944932).

The spelling of 11413521 in words is "eleven million, four hundred thirteen thousand, five hundred twenty-one".