11601641 has 2 divisors, whose sum is σ = 11601642. Its totient is φ = 11601640.

The previous prime is 11601631. The next prime is 11601643. The reversal of 11601641 is 14610611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11424400 + 177241 = 3380^2 + 421^2 .

It is an emirp because it is prime and its reverse (14610611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11601641 - 2¹⁴ = 11585257 is a prime.

Together with 11601643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11601643) 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 as a sum of consecutive naturals, namely, 5800820 + 5800821.

It is an arithmetic number, because the mean of its divisors is an integer number (5800821).

Almost surely, 2^11601641 is an apocalyptic number.

It is an amenable number.

11601641 is a deficient number, since it is larger than the sum of its proper divisors (1).

11601641 is an equidigital number, since it uses as much as digits as its factorization.

11601641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 11601641 is about 3406.1181717609. The cubic root of 11601641 is about 226.3809132169.

The spelling of 11601641 in words is "eleven million, six hundred one thousand, six hundred forty-one".