13023421 has 2 divisors, whose sum is σ = 13023422. Its totient is φ = 13023420.

The previous prime is 13023391. The next prime is 13023427. The reversal of 13023421 is 12432031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 164025 = 3586^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 13023421 - 2⁵ = 13023389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13023395 and 13023404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13023427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6511710 + 6511711.

It is an arithmetic number, because the mean of its divisors is an integer number (6511711).

Almost surely, 2^13023421 is an apocalyptic number.

It is an amenable number.

13023421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13023421 is an equidigital number, since it uses as much as digits as its factorization.

13023421 is an evil number, because the sum of its binary digits is even.

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

The square root of 13023421 is about 3608.7977222338. The cubic root of 13023421 is about 235.2745907484.

Adding to 13023421 its reverse (12432031), we get a palindrome (25455452).

The spelling of 13023421 in words is "thirteen million, twenty-three thousand, four hundred twenty-one".