13503525 has 72 divisors (see below), whose sum is σ = 27408960. Its totient is φ = 5744640.

The previous prime is 13503521. The next prime is 13503527. The reversal of 13503525 is 52530531.

It is not a de Polignac number, because 13503525 - 2² = 13503521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13503495 and 13503504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13503521) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 151681 + ... + 151769.

It is an arithmetic number, because the mean of its divisors is an integer number (380680).

Almost surely, 2^13503525 is an apocalyptic number.

13503525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13503525 is an abundant number, since it is smaller than the sum of its proper divisors (13905435).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13503525 is a wasteful number, since it uses less digits than its factorization.

13503525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 121 counting only the distinct ones).

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

The square root of 13503525 is about 3674.7142746069. The cubic root of 13503525 is about 238.1308803943.

It can be divided in two parts, 13503 and 525, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13503525 in words is "thirteen million, five hundred three thousand, five hundred twenty-five".