19421121 has 8 divisors (see below), whose sum is σ = 25924320. Its totient is φ = 12932672.

The previous prime is 19421113. The next prime is 19421141. The reversal of 19421121 is 12112491.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 19421121 - 2³ = 19421113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19421111) 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 in 7 ways as a sum of consecutive naturals, for example, 120 + ... + 6233.

It is an arithmetic number, because the mean of its divisors is an integer number (3240540).

Almost surely, 2^19421121 is an apocalyptic number.

It is an amenable number.

19421121 is a deficient number, since it is larger than the sum of its proper divisors (6503199).

19421121 is a wasteful number, since it uses less digits than its factorization.

19421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7375.

The product of its digits is 144, while the sum is 21.

The square root of 19421121 is about 4406.9400948958. The cubic root of 19421121 is about 268.7972149965.

The spelling of 19421121 in words is "nineteen million, four hundred twenty-one thousand, one hundred twenty-one".