11421859 has 2 divisors, whose sum is σ = 11421860. Its totient is φ = 11421858.

The previous prime is 11421803. The next prime is 11421877. The reversal of 11421859 is 95812411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11421859 - 2¹³ = 11413667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11421859.

It is not a weakly prime, because it can be changed into another prime (11421889) 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, 5710929 + 5710930.

It is an arithmetic number, because the mean of its divisors is an integer number (5710930).

Almost surely, 2^11421859 is an apocalyptic number.

11421859 is a deficient number, since it is larger than the sum of its proper divisors (1).

11421859 is an equidigital number, since it uses as much as digits as its factorization.

11421859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 31.

The square root of 11421859 is about 3379.6240915226. The cubic root of 11421859 is about 225.2054682779.

The spelling of 11421859 in words is "eleven million, four hundred twenty-one thousand, eight hundred fifty-nine".