13090421 has 2 divisors, whose sum is σ = 13090422. Its totient is φ = 13090420.

The previous prime is 13090369. The next prime is 13090423. The reversal of 13090421 is 12409031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7263025 + 5827396 = 2695^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 13090421 - 2¹⁰ = 13089397 is a prime.

Together with 13090423, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 13090393 and 13090402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13090423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6545210 + 6545211.

It is an arithmetic number, because the mean of its divisors is an integer number (6545211).

Almost surely, 2^13090421 is an apocalyptic number.

It is an amenable number.

13090421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13090421 is an equidigital number, since it uses as much as digits as its factorization.

13090421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 13090421 is about 3618.0686837041. The cubic root of 13090421 is about 235.6773636340.

Adding to 13090421 its reverse (12409031), we get a palindrome (25499452).

The spelling of 13090421 in words is "thirteen million, ninety thousand, four hundred twenty-one".