11651081 has 8 divisors (see below), whose sum is σ = 12606720. Its totient is φ = 10703952.

The previous prime is 11651063. The next prime is 11651083. The reversal of 11651081 is 18015611.

It is a happy number.

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 11651081 - 2¹⁴ = 11634697 is a prime.

It is a super-2 number, since 2×11651081² = 271495376937122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11651083) 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, 890 + ... + 4908.

It is an arithmetic number, because the mean of its divisors is an integer number (1575840).

Almost surely, 2^11651081 is an apocalyptic number.

It is an amenable number.

11651081 is a deficient number, since it is larger than the sum of its proper divisors (955639).

11651081 is a wasteful number, since it uses less digits than its factorization.

11651081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4255.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 11651081 is about 3413.3679848502. The cubic root of 11651081 is about 226.7020290368.

Adding to 11651081 its reverse (18015611), we get a palindrome (29666692).

The spelling of 11651081 in words is "eleven million, six hundred fifty-one thousand, eighty-one".