11415121 has 4 divisors (see below), whose sum is σ = 11528244. Its totient is φ = 11302000.

The previous prime is 11415119. The next prime is 11415137. The reversal of 11415121 is 12151411.

11415121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 10010896 + 1404225 = 3164^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 11415121 - 2¹ = 11415119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11415095 and 11415104.

It is not an unprimeable number, because it can be changed into a prime (11415191) 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, 56410 + ... + 56611.

It is an arithmetic number, because the mean of its divisors is an integer number (2882061).

Almost surely, 2^11415121 is an apocalyptic number.

It is an amenable number.

11415121 is a deficient number, since it is larger than the sum of its proper divisors (113123).

11415121 is a wasteful number, since it uses less digits than its factorization.

11415121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113122.

The product of its digits is 40, while the sum is 16.

The square root of 11415121 is about 3378.6270880344. The cubic root of 11415121 is about 225.1611750523.

Adding to 11415121 its reverse (12151411), we get a palindrome (23566532).

The spelling of 11415121 in words is "eleven million, four hundred fifteen thousand, one hundred twenty-one".