11005961 has 4 divisors (see below), whose sum is σ = 11361024. Its totient is φ = 10650900.

The previous prime is 11005957. The next prime is 11006011. The reversal of 11005961 is 16950011.

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 a cyclic number.

It is not a de Polignac number, because 11005961 - 2² = 11005957 is a prime.

It is a super-2 number, since 2×11005961² = 242262355067042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11005901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177485 + ... + 177546.

It is an arithmetic number, because the mean of its divisors is an integer number (2840256).

Almost surely, 2^11005961 is an apocalyptic number.

It is an amenable number.

11005961 is a deficient number, since it is larger than the sum of its proper divisors (355063).

11005961 is an equidigital number, since it uses as much as digits as its factorization.

11005961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355062.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 11005961 is about 3317.5233232036. The cubic root of 11005961 is about 222.4381749700.

Adding to 11005961 its reverse (16950011), we get a palindrome (27955972).

The spelling of 11005961 in words is "eleven million, five thousand, nine hundred sixty-one".