11287321 has 2 divisors, whose sum is σ = 11287322. Its totient is φ = 11287320.

The previous prime is 11287313. The next prime is 11287343. The reversal of 11287321 is 12378211.

It is a happy number.

11287321 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7901721 + 3385600 = 2811^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 11287321 - 2³ = 11287313 is a prime.

It is not a weakly prime, because it can be changed into another prime (11287301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5643660 + 5643661.

It is an arithmetic number, because the mean of its divisors is an integer number (5643661).

Almost surely, 2^11287321 is an apocalyptic number.

It is an amenable number.

11287321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11287321 is an equidigital number, since it uses as much as digits as its factorization.

11287321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 25.

The square root of 11287321 is about 3359.6608459784. The cubic root of 11287321 is about 224.3177423646.

The spelling of 11287321 in words is "eleven million, two hundred eighty-seven thousand, three hundred twenty-one".