13505451 has 4 divisors (see below), whose sum is σ = 18007272. Its totient is φ = 9003632.

The previous prime is 13505449. The next prime is 13505501. The reversal of 13505451 is 15450531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15450531 = 3 ⋅5150177.

It is a cyclic number.

It is not a de Polignac number, because 13505451 - 2¹ = 13505449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13505411) 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, 2250906 + ... + 2250911.

It is an arithmetic number, because the mean of its divisors is an integer number (4501818).

Almost surely, 2^13505451 is an apocalyptic number.

13505451 is a deficient number, since it is larger than the sum of its proper divisors (4501821).

13505451 is an equidigital number, since it uses as much as digits as its factorization.

13505451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501820.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 13505451 is about 3674.9763264544. The cubic root of 13505451 is about 238.1422013463.

Adding to 13505451 its reverse (15450531), we get a palindrome (28955982).

It can be divided in two parts, 1350545 and 1, that added together give a triangular number (1350546 = T₁₆₄₃).

The spelling of 13505451 in words is "thirteen million, five hundred five thousand, four hundred fifty-one".