11421389 has 8 divisors (see below), whose sum is σ = 13503360. Its totient is φ = 9452016.

The previous prime is 11421379. The next prime is 11421401. The reversal of 11421389 is 98312411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11421389 - 2¹² = 11417293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421379) 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 in 7 ways as a sum of consecutive naturals, for example, 27929 + ... + 28334.

It is an arithmetic number, because the mean of its divisors is an integer number (1687920).

Almost surely, 2^11421389 is an apocalyptic number.

It is an amenable number.

11421389 is a deficient number, since it is larger than the sum of its proper divisors (2081971).

11421389 is an equidigital number, since it uses as much as digits as its factorization.

11421389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56299.

The product of its digits is 1728, while the sum is 29.

The square root of 11421389 is about 3379.5545564468. The cubic root of 11421389 is about 225.2023792296.

The spelling of 11421389 in words is "eleven million, four hundred twenty-one thousand, three hundred eighty-nine".