11081961 has 16 divisors (see below), whose sum is σ = 17910720. Its totient is φ = 6716160.

The previous prime is 11081951. The next prime is 11081969. The reversal of 11081961 is 16918011.

It is not a de Polignac number, because 11081961 - 2⁶ = 11081897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11081969) 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 15 ways as a sum of consecutive naturals, for example, 18360 + ... + 18953.

It is an arithmetic number, because the mean of its divisors is an integer number (1119420).

Almost surely, 2^11081961 is an apocalyptic number.

11081961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11081961 is a deficient number, since it is larger than the sum of its proper divisors (6828759).

11081961 is a wasteful number, since it uses less digits than its factorization.

11081961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37333 (or 37327 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 11081961 is about 3328.9579450633. The cubic root of 11081961 is about 222.9490053452.

Adding to 11081961 its reverse (16918011), we get a palindrome (27999972).

The spelling of 11081961 in words is "eleven million, eighty-one thousand, nine hundred sixty-one".