13194021 has 4 divisors (see below), whose sum is σ = 17592032. Its totient is φ = 8796012.

The previous prime is 13194011. The next prime is 13194031. The reversal of 13194021 is 12049131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12049131 = 3 ⋅4016377.

It is an interprime number because it is at equal distance from previous prime (13194011) and next prime (13194031).

It is not a de Polignac number, because 13194021 - 2⁷ = 13193893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13194011) 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 3 ways as a sum of consecutive naturals, for example, 2199001 + ... + 2199006.

It is an arithmetic number, because the mean of its divisors is an integer number (4398008).

Almost surely, 2^13194021 is an apocalyptic number.

It is an amenable number.

13194021 is a deficient number, since it is larger than the sum of its proper divisors (4398011).

13194021 is an equidigital number, since it uses as much as digits as its factorization.

13194021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398010.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 13194021 is about 3632.3574989255. The cubic root of 13194021 is about 236.2974619797.

The spelling of 13194021 in words is "thirteen million, one hundred ninety-four thousand, twenty-one".