11435521 has 4 divisors (see below), whose sum is σ = 11564100. Its totient is φ = 11306944.

The previous prime is 11435519. The next prime is 11435537. The reversal of 11435521 is 12553411.

It is a happy number.

11435521 is digitally balanced in base 2, because in such base 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: 12553411 = 13 ⋅965647.

It can be written as a sum of positive squares in 2 ways, for example, as 1354896 + 10080625 = 1164^2 + 3175^2 .

It is a cyclic number.

It is not a de Polignac number, because 11435521 - 2¹ = 11435519 is a prime.

It is a super-2 number, since 2×11435521² = 261542281082882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11435492 and 11435501.

It is not an unprimeable number, because it can be changed into a prime (11435561) 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, 64156 + ... + 64333.

It is an arithmetic number, because the mean of its divisors is an integer number (2891025).

Almost surely, 2^11435521 is an apocalyptic number.

It is an amenable number.

11435521 is a deficient number, since it is larger than the sum of its proper divisors (128579).

11435521 is an equidigital number, since it uses as much as digits as its factorization.

11435521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128578.

The product of its digits is 600, while the sum is 22.

The square root of 11435521 is about 3381.6447181808. The cubic root of 11435521 is about 225.2952239879.

Adding to 11435521 its reverse (12553411), we get a palindrome (23988932).

The spelling of 11435521 in words is "eleven million, four hundred thirty-five thousand, five hundred twenty-one".