11615121 has 24 divisors (see below), whose sum is σ = 19266624. Its totient is φ = 6605280.

The previous prime is 11615113. The next prime is 11615129. The reversal of 11615121 is 12151611.

It is a happy number.

11615121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11615113) and next prime (11615129).

It is not a de Polignac number, because 11615121 - 2³ = 11615113 is a prime.

It is a super-2 number, since 2×11615121² = 269822071689282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11615094 and 11615103.

It is not an unprimeable number, because it can be changed into a prime (11615129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20575 + ... + 21131.

It is an arithmetic number, because the mean of its divisors is an integer number (802776).

Almost surely, 2^11615121 is an apocalyptic number.

It is an amenable number.

11615121 is a deficient number, since it is larger than the sum of its proper divisors (7651503).

11615121 is a wasteful number, since it uses less digits than its factorization.

11615121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 898 counting only the distinct ones).

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

The square root of 11615121 is about 3408.0963894820. The cubic root of 11615121 is about 226.4685569556.

Adding to 11615121 its reverse (12151611), we get a palindrome (23766732).

The spelling of 11615121 in words is "eleven million, six hundred fifteen thousand, one hundred twenty-one".