13525503 has 4 divisors (see below), whose sum is σ = 18034008. Its totient is φ = 9017000.

The previous prime is 13525493. The next prime is 13525529. The reversal of 13525503 is 30552531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30552531 = 3 ⋅10184177.

It is a cyclic number.

It is not a de Polignac number, because 13525503 - 2⁴ = 13525487 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13525543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254248 + ... + 2254253.

It is an arithmetic number, because the mean of its divisors is an integer number (4508502).

Almost surely, 2^13525503 is an apocalyptic number.

13525503 is a deficient number, since it is larger than the sum of its proper divisors (4508505).

13525503 is an equidigital number, since it uses as much as digits as its factorization.

13525503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508504.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 13525503 is about 3677.7034953895. The cubic root of 13525503 is about 238.2600023254.

It can be divided in two parts, 13525 and 503, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13525503 in words is "thirteen million, five hundred twenty-five thousand, five hundred three".