11455521 has 32 divisors (see below), whose sum is σ = 19270656. Its totient is φ = 5880000.

The previous prime is 11455513. The next prime is 11455531. The reversal of 11455521 is 12555411.

It is not a de Polignac number, because 11455521 - 2³ = 11455513 is a prime.

It is a super-2 number, since 2×11455521² = 262457922762882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11455491 and 11455500.

It is not an unprimeable number, because it can be changed into a prime (11455531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23086 + ... + 23576.

It is an arithmetic number, because the mean of its divisors is an integer number (602208).

Almost surely, 2^11455521 is an apocalyptic number.

11455521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11455521 is a deficient number, since it is larger than the sum of its proper divisors (7815135).

11455521 is a wasteful number, since it uses less digits than its factorization.

11455521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613.

The product of its digits is 1000, while the sum is 24.

The square root of 11455521 is about 3384.6005672753. The cubic root of 11455521 is about 225.4264898387.

It can be divided in two parts, 1145 and 5521, that added together give a palindrome (6666).

The spelling of 11455521 in words is "eleven million, four hundred fifty-five thousand, five hundred twenty-one".