13021423 has 4 divisors (see below), whose sum is σ = 13104520. Its totient is φ = 12938328.

The previous prime is 13021399. The next prime is 13021429. The reversal of 13021423 is 32412031.

It is a happy number.

13021423 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13021423 - 2⁵ = 13021391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13021397 and 13021406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41313 + ... + 41626.

It is an arithmetic number, because the mean of its divisors is an integer number (3276130).

Almost surely, 2^13021423 is an apocalyptic number.

13021423 is a deficient number, since it is larger than the sum of its proper divisors (83097).

13021423 is an equidigital number, since it uses as much as digits as its factorization.

13021423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83096.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13021423 is about 3608.5208881202. The cubic root of 13021423 is about 235.2625585112.

Adding to 13021423 its reverse (32412031), we get a palindrome (45433454).

The spelling of 13021423 in words is "thirteen million, twenty-one thousand, four hundred twenty-three".