11653121 has 2 divisors, whose sum is σ = 11653122. Its totient is φ = 11653120.

The previous prime is 11653087. The next prime is 11653153. The reversal of 11653121 is 12135611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9388096 + 2265025 = 3064^2 + 1505^2 .

It is an emirp because it is prime and its reverse (12135611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11653121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11653093 and 11653102.

It is not a weakly prime, because it can be changed into another prime (11653171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5826560 + 5826561.

It is an arithmetic number, because the mean of its divisors is an integer number (5826561).

It is a Proth number, since it is equal to 2845 ⋅ 2¹² + 1 and 2845 < 2¹².

Almost surely, 2^11653121 is an apocalyptic number.

It is an amenable number.

11653121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11653121 is an equidigital number, since it uses as much as digits as its factorization.

11653121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 20.

The square root of 11653121 is about 3413.6667968623. Note that the first 3 decimals coincide. The cubic root of 11653121 is about 226.7152594301.

Adding to 11653121 its reverse (12135611), we get a palindrome (23788732).

The spelling of 11653121 in words is "eleven million, six hundred fifty-three thousand, one hundred twenty-one".