11553121 has 8 divisors (see below), whose sum is σ = 12196800. Its totient is φ = 10913040.

The previous prime is 11553119. The next prime is 11553127. The reversal of 11553121 is 12135511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11553121 - 2¹ = 11553119 is a prime.

It is a super-3 number, since 3×11553121³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11553127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8100 + ... + 9418.

It is an arithmetic number, because the mean of its divisors is an integer number (1524600).

Almost surely, 2^11553121 is an apocalyptic number.

It is an amenable number.

11553121 is a deficient number, since it is larger than the sum of its proper divisors (643679).

11553121 is a wasteful number, since it uses less digits than its factorization.

11553121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799.

The product of its digits is 150, while the sum is 19.

The square root of 11553121 is about 3398.9882318125. The cubic root of 11553121 is about 226.0648846512.

Adding to 11553121 its reverse (12135511), we get a palindrome (23688632).

The spelling of 11553121 in words is "eleven million, five hundred fifty-three thousand, one hundred twenty-one".