11560981 has 2 divisors, whose sum is σ = 11560982. Its totient is φ = 11560980.

The previous prime is 11560979. The next prime is 11561021. The reversal of 11560981 is 18906511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 5134756 = 2535^2 + 2266^2 .

It is a cyclic number.

It is not a de Polignac number, because 11560981 - 2¹ = 11560979 is a prime.

It is a super-2 number, since 2×11560981² = 267312563364722, which contains 22 as substring.

Together with 11560979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11560921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780490 + 5780491.

It is an arithmetic number, because the mean of its divisors is an integer number (5780491).

Almost surely, 2^11560981 is an apocalyptic number.

It is an amenable number.

11560981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11560981 is an equidigital number, since it uses as much as digits as its factorization.

11560981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 11560981 is about 3400.1442616454. The cubic root of 11560981 is about 226.1161396956.

The spelling of 11560981 in words is "eleven million, five hundred sixty thousand, nine hundred eighty-one".