13563401 has 4 divisors (see below), whose sum is σ = 13852032. Its totient is φ = 13274772.

The previous prime is 13563383. The next prime is 13563409. The reversal of 13563401 is 10436531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10436531 = 7 ⋅1490933.

It is a cyclic number.

It is not a de Polignac number, because 13563401 - 2¹⁰ = 13562377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13563409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144245 + ... + 144338.

It is an arithmetic number, because the mean of its divisors is an integer number (3463008).

Almost surely, 2^13563401 is an apocalyptic number.

It is an amenable number.

13563401 is a deficient number, since it is larger than the sum of its proper divisors (288631).

13563401 is an equidigital number, since it uses as much as digits as its factorization.

13563401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288630.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 13563401 is about 3682.8522913633. The cubic root of 13563401 is about 238.4823269504.

Adding to 13563401 its reverse (10436531), we get a palindrome (23999932).

It can be divided in two parts, 135 and 63401, that added together give a palindrome (63536).

The spelling of 13563401 in words is "thirteen million, five hundred sixty-three thousand, four hundred one".