13524421 has 2 divisors, whose sum is σ = 13524422. Its totient is φ = 13524420.

The previous prime is 13524389. The next prime is 13524431. The reversal of 13524421 is 12442531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12496225 + 1028196 = 3535^2 + 1014^2 .

It is an emirp because it is prime and its reverse (12442531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13524421 - 2⁵ = 13524389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13524392 and 13524401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13524431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6762210 + 6762211.

It is an arithmetic number, because the mean of its divisors is an integer number (6762211).

Almost surely, 2^13524421 is an apocalyptic number.

It is an amenable number.

13524421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13524421 is an equidigital number, since it uses as much as digits as its factorization.

13524421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 22.

The square root of 13524421 is about 3677.5563897784. The cubic root of 13524421 is about 238.2536487922.

Adding to 13524421 its reverse (12442531), we get a palindrome (25966952).

The spelling of 13524421 in words is "thirteen million, five hundred twenty-four thousand, four hundred twenty-one".