13290421 has 2 divisors, whose sum is σ = 13290422. Its totient is φ = 13290420.

The previous prime is 13290401. The next prime is 13290449. The reversal of 13290421 is 12409231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 509796 = 3575^2 + 714^2 .

It is an emirp because it is prime and its reverse (12409231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13290421 - 2¹⁵ = 13257653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13290392 and 13290401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13290401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6645210 + 6645211.

It is an arithmetic number, because the mean of its divisors is an integer number (6645211).

Almost surely, 2^13290421 is an apocalyptic number.

It is an amenable number.

13290421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13290421 is an equidigital number, since it uses as much as digits as its factorization.

13290421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 13290421 is about 3645.6029679602. The cubic root of 13290421 is about 236.8715559124.

Adding to 13290421 its reverse (12409231), we get a palindrome (25699652).

The spelling of 13290421 in words is "thirteen million, two hundred ninety thousand, four hundred twenty-one".