11456021 has 2 divisors, whose sum is σ = 11456022. Its totient is φ = 11456020.

The previous prime is 11455999. The next prime is 11456023. The reversal of 11456021 is 12065411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9991921 + 1464100 = 3161^2 + 1210^2 .

It is an emirp because it is prime and its reverse (12065411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11456021 - 2¹⁰ = 11454997 is a prime.

Together with 11456023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11455984 and 11456002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11456023) 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, 5728010 + 5728011.

It is an arithmetic number, because the mean of its divisors is an integer number (5728011).

Almost surely, 2^11456021 is an apocalyptic number.

It is an amenable number.

11456021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11456021 is an equidigital number, since it uses as much as digits as its factorization.

11456021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 11456021 is about 3384.6744304290. The cubic root of 11456021 is about 225.4297695267.

The spelling of 11456021 in words is "eleven million, four hundred fifty-six thousand, twenty-one".