11345521 has 4 divisors (see below), whose sum is σ = 12376944. Its totient is φ = 10314100.

The previous prime is 11345501. The next prime is 11345549. The reversal of 11345521 is 12554311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11345521 - 2⁷ = 11345393 is a prime.

It is a super-2 number, since 2×11345521² = 257441693522882, 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 = 11345492 and 11345501.

It is not an unprimeable number, because it can be changed into a prime (11345501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515695 + ... + 515716.

It is an arithmetic number, because the mean of its divisors is an integer number (3094236).

Almost surely, 2^11345521 is an apocalyptic number.

11345521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11345521 is a deficient number, since it is larger than the sum of its proper divisors (1031423).

11345521 is a wasteful number, since it uses less digits than its factorization.

11345521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031422.

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

The square root of 11345521 is about 3368.3112979652. The cubic root of 11345521 is about 224.7026260754.

Adding to 11345521 its reverse (12554311), we get a palindrome (23899832).

The spelling of 11345521 in words is "eleven million, three hundred forty-five thousand, five hundred twenty-one".