11115621 has 12 divisors (see below), whose sum is σ = 17515680. Its totient is φ = 6736680.

The previous prime is 11115593. The next prime is 11115623. The reversal of 11115621 is 12651111.

It is a happy number.

11115621 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 11115621 - 2⁶ = 11115557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11115594 and 11115603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11115623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56041 + ... + 56238.

It is an arithmetic number, because the mean of its divisors is an integer number (1459640).

Almost surely, 2^11115621 is an apocalyptic number.

11115621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11115621 is a deficient number, since it is larger than the sum of its proper divisors (6400059).

11115621 is a wasteful number, since it uses less digits than its factorization.

11115621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112296 (or 112293 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 11115621 is about 3334.0097480361. The cubic root of 11115621 is about 223.1745032925.

Adding to 11115621 its reverse (12651111), we get a palindrome (23766732).

The spelling of 11115621 in words is "eleven million, one hundred fifteen thousand, six hundred twenty-one".