11672081 has 4 divisors (see below), whose sum is σ = 12358692. Its totient is φ = 10985472.

The previous prime is 11672077. The next prime is 11672093. The reversal of 11672081 is 18027611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18027611 = 7 ⋅2575373.

It can be written as a sum of positive squares in 2 ways, for example, as 9241600 + 2430481 = 3040^2 + 1559^2 .

It is a cyclic number.

It is not a de Polignac number, because 11672081 - 2² = 11672077 is a prime.

It is a super-2 number, since 2×11672081² = 272474949741122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11672081.

It is not an unprimeable number, because it can be changed into a prime (11672051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343280 + ... + 343313.

It is an arithmetic number, because the mean of its divisors is an integer number (3089673).

Almost surely, 2^11672081 is an apocalyptic number.

It is an amenable number.

11672081 is a deficient number, since it is larger than the sum of its proper divisors (686611).

11672081 is an equidigital number, since it uses as much as digits as its factorization.

11672081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686610.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 11672081 is about 3416.4427406295. The cubic root of 11672081 is about 226.8381504606.

Adding to 11672081 its reverse (18027611), we get a palindrome (29699692).

The spelling of 11672081 in words is "eleven million, six hundred seventy-two thousand, eighty-one".