11951081 has 8 divisors (see below), whose sum is σ = 12149760. Its totient is φ = 11754288.

The previous prime is 11951077. The next prime is 11951083. The reversal of 11951081 is 18015911.

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 11951081 - 2² = 11951077 is a prime.

It is a super-2 number, since 2×11951081² = 285656674137122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11951081.

It is not an unprimeable number, because it can be changed into a prime (11951083) 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, 17315 + ... + 17991.

It is an arithmetic number, because the mean of its divisors is an integer number (1518720).

Almost surely, 2^11951081 is an apocalyptic number.

It is an amenable number.

11951081 is a deficient number, since it is larger than the sum of its proper divisors (198679).

11951081 is a wasteful number, since it uses less digits than its factorization.

11951081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943.

The product of its (nonzero) digits is 360, while the sum is 26.

The square root of 11951081 is about 3457.0335549427. The cubic root of 11951081 is about 228.6313232734.

Adding to 11951081 its reverse (18015911), we get a palindrome (29966992).

The spelling of 11951081 in words is "eleven million, nine hundred fifty-one thousand, eighty-one".