11420621 has 2 divisors, whose sum is σ = 11420622. Its totient is φ = 11420620.

The previous prime is 11420611. The next prime is 11420623. The reversal of 11420621 is 12602411.

11420621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5827396 + 5593225 = 2414^2 + 2365^2 .

It is an emirp because it is prime and its reverse (12602411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11420621 is a prime.

It is a Sophie Germain prime.

Together with 11420623, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11420621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11420623) 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 as a sum of consecutive naturals, namely, 5710310 + 5710311.

It is an arithmetic number, because the mean of its divisors is an integer number (5710311).

Almost surely, 2^11420621 is an apocalyptic number.

It is an amenable number.

11420621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420621 is an equidigital number, since it uses as much as digits as its factorization.

11420621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 11420621 is about 3379.4409300948. The cubic root of 11420621 is about 225.1973314109.

The spelling of 11420621 in words is "eleven million, four hundred twenty thousand, six hundred twenty-one".