11851409 has 2 divisors, whose sum is σ = 11851410. Its totient is φ = 11851408.

The previous prime is 11851403. The next prime is 11851447. The reversal of 11851409 is 90415811.

11851409 is digitally balanced in base 2, because in such base 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., 6225025 + 5626384 = 2495^2 + 2372^2 .

It is an emirp because it is prime and its reverse (90415811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11851409 - 2²⁰ = 10802833 is a prime.

It is not a weakly prime, because it can be changed into another prime (11851403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5925704 + 5925705.

It is an arithmetic number, because the mean of its divisors is an integer number (5925705).

Almost surely, 2^11851409 is an apocalyptic number.

It is an amenable number.

11851409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11851409 is an equidigital number, since it uses as much as digits as its factorization.

11851409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 11851409 is about 3442.5875442754. The cubic root of 11851409 is about 227.9939531073.

The spelling of 11851409 in words is "eleven million, eight hundred fifty-one thousand, four hundred nine".