11955081 has 4 divisors (see below), whose sum is σ = 15940112. Its totient is φ = 7970052.

The previous prime is 11955037. The next prime is 11955089. The reversal of 11955081 is 18055911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11955081 - 2⁶ = 11955017 is a prime.

It is a super-2 number, since 2×11955081² = 285847923433122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11955089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1992511 + ... + 1992516.

It is an arithmetic number, because the mean of its divisors is an integer number (3985028).

Almost surely, 2^11955081 is an apocalyptic number.

It is an amenable number.

11955081 is a deficient number, since it is larger than the sum of its proper divisors (3985031).

11955081 is an equidigital number, since it uses as much as digits as its factorization.

11955081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985030.

The product of its (nonzero) digits is 1800, while the sum is 30.

The square root of 11955081 is about 3457.6120372303. The cubic root of 11955081 is about 228.6568278918.

The spelling of 11955081 in words is "eleven million, nine hundred fifty-five thousand, eighty-one".